We are a specialist, independent company. That’s why we can offer a flexible, personal service and help our clients quickly.
Nigel has been with TNEI since it’s inception and has been a constant member of the management team which has seen TNEI transform from a fledgling renewables operation in the north east of England to the multi-site, thriving and diverse specialist consultancy that it is today. He is delighted to be leading such a talented team of specialists and experts in their fields.
Resources & Operations Director
Nilanga is the Resources and Operations Director of TNEI Services Ltd. She is an Electrical Engineer who is based in our Manchester office and has a broad range of experience in people and project management, power system studies and grid code compliance. Nilanga gained her BSc (Hons) in Engineering from University of Moratuwa in Sri Lanka and her PhD from University of Manchester.
She worked as a Post-Doctoral Research Associate at University of Manchester for four years before joining TNEI. She joined TNEI in 2009 as a Technical Consultant and took the Operations Manager role in 2014 leading to being appointed as the Operations Director in 2016.
She enjoys the daily operational challenges of leading a team of 50+ consultants whilst still being involved in the varied technically challenging projects as a project director. Nilanga has 17 years of experience in the power industry including the time she spent on her PhD on Microgrids. At TNEI she has been predominantly working on onshore renewable projects.
Director of Client Strategy & Policy and Director of TNEI Africa
Dieter joined TNEI in 2018 and has more than 20 years of electrical engineering-, international project management- and consulting experience in various areas of the electrical industry. He is passionate about making energy systems smarter and cleaner.
He has led several technical and management assignments in Africa and Europe including the development of operational strategies, policies and standards, network planning and substation design, telecommunications and SCADA systems, smart grid innovation projects, techno-economic feasibility modelling and due diligence studies.
Recently Dieter worked as a project and programme manager overseeing the design, engineering and construction of 400kV to 33kV electrical balance-of-plant for wind farms. He has also led TNEI’s contribution on the Distributed ReStart project - a UK innovation project exploring the use of Distributed Energy Resources for black.
Dieter is the main contact for companies looking to discuss collaboration on large projects and strategic partnerships.
Director of Connections
Director of Connections, Mustafa has been with TNEI since 2007 and specialises in the modelling of power system equipment and network analysis. He has experience in load flow, fault level, harmonic analysis, traction networks, dynamic models, and the transient behaviour of transmission and distribution systems.
Mustafa is the main contact for power systems design and studies, engineering design, offshore renewables, protection studies and power generation services.
Director of Networks & Innovation and Director of TNEI Ireland
Stephanie is Director of the Networks & Innovation Team at TNEI. She is a Chartered electrical engineer with 12 years of experience in the power industry, including a 4-year PhD on active network management and control of distribution networks and 8 years as a power system consultant.
Her experience spans power system planning, design and operation, with expertise in modelling and performing system studies.
In her 5 years at TNEI, Stephanie has been supporting clients through the energy transition, providing technical and market advice on emerging technologies and delivering concept, innovation and strategy projects for utilities and other industry organisations.
She recently delivered the “Black Start from Non-Traditional Generation Technologies” NIA project to National Grid ESO, and is actively involved in the Distributed ReStart NIC project, where TNEI is a project partner. Stephanie drives the development of the work of the N&I team, such that TNEI are well-placed to support the ambitions of the energy industry.
She is the main contact for companies wishing to discuss innovation, strategy, regulation, network design and modelling solutions.
Director of Environment & Engineering
James is the Director of the Environment & Engineering team, which provides a range of services including EIA, planning, noise assessments, GIS / CAD mapping, shadow flicker assessments, civil engineering, geotechnical assessments, and soil resistivity measurements.
Since joining TNEI in 2006 James has worked on over 4.5 GW of onshore renewable energy projects. Project support includes initial site finding and feasibility assessment, planning applications / EIAs, appeals (where required) along with post consent services including due diligence, compliance monitoring and complaints investigations. James has developed a particularly detailed knowledge of wind farm noise assessments and in 2013/2014 was involved in the drafting of Good Practice Guidance for wind farm noise assessment for the Institute of Acoustics (IOA GPG).
Our team of specialists support a variety of clients including project developers, operators, Local Authorities and Government departments. We work on projects in the renewable energy, transmission and distribution, oil and gas, transportation, residential and industrial sectors.
James is the main contact for EIA, planning, noise assessments, GIS / CAD mapping, shadow flicker assessments, civil engineering, geotechnical assessment and expert witness services.
TNEI Africa Lead
Johan Smith is a senior consultant with over 10 years of experience in power systems analysis. His experience includes transmission and distribution system modelling, network planning and feasibility of integrating power plants into electrical grids, HVAC/HVDC interconnections and grid code compliance. During his career Johan has developed system models for electrical power networks both in Africa and internationally.
Since 2012, he has been performing steady state and dynamic grid integration and compliance studies for independent power producer renewable energy projects. His experience includes interconnected systems as well as mini grids and the influence of Variable Renewable technologies. He holds a M.Tech degree in Electrical Engineering and is professionally registered with the Engineering Council of South Africa. Johan is the main contact for companies looking to discuss projects or strategic partnerships in South Africa and the rest of Africa.
Principal Consultant and Director of TNEI Ireland
Nathaniel is a commercially aware engineer and project manager, with experience of HVDC schemes at all stages of the project lifecycle. He works well within multi-disciplinary teams, including interfacing with planners, EIA coordinators, lawyers, procurement specialists and land agents.
Nathaniel takes an active interest in energy regulatory and policy matters and has acted as a Senior Policy Advisor to the National Infrastructure Commission.
Country Manager and Director of TNEI Ireland
Dearbhla is Country Manager and Director of TNEI Ireland. She has over 13 years experience within the energy industry in Ireland.
Her experience spans power system planning and operation, with expertise in network modelling and power system analysis. Dearbhla has worked in a diversity of roles, both technical and commercial, leading numerous detailed technical and economic analysis of some of Ireland’s largest infrastructure developments. She has also worked on developing connection policies and methodologies as well as identifying and assessing connection method options for generator and demand applications.
She has significant experience managing and supporting connecting parties, from the project concept stage, through the connection process and continued to support them post-energisation. Dearbhla has considerable experience managing client issues, some sensitive and complex, relating to connection methods, contracts and commercial concerns, deliverability as well as Grid Code compliance and outage management.
Meet the Team
Environment & Engineering Team Manager
Jim is the Environment & Engineering Team Manager and carries out environmental noise propagation modelling, assessment and reporting for a wide range of sectors, with particular expertise in industrial, commercial and energy projects.
He leads projects for IPPC permitting, planning applications, conditions discharge, EIA, and noise control and management. He is also experienced in noise and vibration monitoring (including blasting), construction and decommissioning work, occupational noise assessments and architectural acoustics.
Connections Team Manager
Dr Gary Preston is a Power Systems Engineer with extensive experience in power system modelling and analysis. Gary specialises in the area of electromagnetic transients and has carried out numerous fault, switching, and lightning studies using EMTP-ATP and PSCAD software to investigate fast and very fast transient phenomena. Gary has managed a wide range of technical projects, ranging from detailed power systems studies to innovation projects. He produces excellent reports and ensures that deliverables are produced on time, within budget, and to the highest standards in terms of quality.
Networks & Innovation Team Manager
Gordon has eight years’ experience working in the fields of power systems, power electronics, and renewables.
Gordons’ work at TNEI is primarily focused on the design and grid integration of innovative network projects such as; electrical vehicles, battery storage, and marine renewables.
Since achieving his PhD Gordon has worked in renewables and innovation; specialising in the power systems and conversion technology of solar farms, wind farms, offshore wind farms, as well as battery storage, hydro, tidal, and wave projects.
Specialist Consultant & Offshore Renewables Lead
Steve leads the Offshore Renewables work at TNEI and has exceptional experience in large projects and offshore wind.
He a Chartered Electrical Engineer with over 25 years experience in the design, installation and commissioning of projects within the power industry and has a broad range of experience in power systems studies, grid code compliance, technical strategy and project management for the power sector, including offshore transmission and offshore wind.
Principal Consultant & Grid Connections Lead
Jonathan is a Principal Consultant and Grid Connections Lead with 10 years’ experience working as an electrical engineer and grid connection specialist.
Jonathan has experience managing the design and delivery of grid connection work packages on both the distribution and transmission network for onshore wind, solar PV, large biomass and battery energy storage projects across the UK. Since he joined TNEI Jonathan has worked with and provided support to offshore wind and island wind developers.
He has also coordinated the delivery of Contestable Works for embedded generators. He has significant experience in power systems analysis specifically providing power quality grid compliance studies (P28 &Harmonics).
Jonathan has good communication skills and has provided technical, commercial and regulatory advice to clients. He has significant project management experience, and a pragmatic approach to problem solving.
Principal Consultant & Industrial Lead
Luke has 13 years’ experience working with a diverse range of large and/or critical electrical power systems including petrochemical plants, power stations, pharmaceutical plants, banks and data centres.
His professional experience includes power systems analysis, power quality measurements and analysis, protection coordination and forensic analysis of failed plant. His varied professional experience has required excellent written and verbal communication skills in addition to a broad technical knowledge.
Yun Tiam Tan
Specialist Consultant & Onshore Renewables Lead
Tan has over 15 years professional experience in both power system consultancy and software development.
He is experienced in power system analysis including load flow, fault level, power quality, harmonic and dynamic studies for various onshore renewable generations.
He is also expertise in undertaking other specialised studies such as wind farm constraint analysis, generation planning and distribution pricing. He is also involved in developing custom software to perform more complex studies e.g. planning tools for DNOs), wind farm annual curtailment and generation incremental transfer capability studies.
Xuecheng is is a power system specialist with over 30 years experience in power systems computation and analysis including bulk power systems modelling and simulations, power system steady state and dynamic analysis, power system security and stability assessment, network planning and strategy development, planning and security of supply standards and grid code compliance.
He has published several papers for IEEE transactions and conference, and has been involved as a regular reviewer in reviewing papers for IET Generation, Transmission and Distribution Journal.
Principal Consultant and Civils & Geotechnical Lead
James works within the Environment & Engineering team providing clients with the advice and support needed to take their project from conception through to construction. Skills within the team include Environmental expertise, Planning, EIA coordination, GIS, Grid Connections, Electrical engineering, Civil Engineering and Health and Safety advice.
James is a Chartered Civil Engineer and Certified Member of the APS, with extensive experience in the energy sector. His career started in the energy sector in 2004 delivering civil, structural designs and geotechnical investigations for onshore wind projects, as well as acting as Owner’s Engineer and Bank’s Engineer.
James later managed a dedicated design team providing input into EIAs, discharging planning conditions, preparing detailed designs, site verifications and defective works investigations. James’ work included the repowering of 2 UK wind projects, technical due diligence across several countries and assisting a Transmission and Distribution contractor develop their Balance of Plant offering to the UK wind market.
In 2014 James joined TNEI where he has applied his skills to support developers on a range of energy projects including onshore and offshore wind, solar, battery storage, STOR, hydrogen, EVs and electricity transmission.
Muhammad is a power system engineer with over nine years of experience. He has been involved with power system studies including load flow, fault level, P28 power quality (transformer inrush, flicker, voltage step change), harmonics, fault-ride through, dynamic reactive power and voltage control, load rejection and frequency control studies for a number of onshore and offshore wind farms.
His varied professional experience includes performing electrical studies on industrial and renewable projects, and calculating network use charges for distribution companies.
Principal Consultant and Environment & Consents Lead
Jason has 11 years’ experience in the environmental consultancy sector working on Environmental Impact Assessment, Environmental Safeguarding and Environmental Due Diligence projects for energy related developments of varying scales.
Jason has extensive experience of coordinating Environmental Impact Assessments, technical review of a range of environmental assessments, production and review of Environmental Statements and consenting documents and undertaking a range of topic specific assessments.
Gordon leads the delivery of projects relating to electricity strategy and regulation. He has a good technical overview of the network planning and system operation challenges facing the energy industry, particularly in GB and Ireland, and regularly advises generation clients on strategies for getting connected to the grid.
He has a strong technical background in power systems analysis and power systems modelling and a good understanding of wholesale energy markets, ancillary service markets and network regulation, with a particular focus on use of system charging.
Dr Andrew Oliver’s core skills are in power systems analysis and developing tools to perform complex studies using Python, with over 10 years of experience.
He has more than ten years of experience including load flow, fault level, harmonics, filter design, reactive power, transient analysis and network planning studies amongst others. Since joining TNEI in early 2009 Andrew has been involved in varied projects including studies for wind farms (on and offshore), PV connections and for transmission and distribution network operators.
Etienne du Preez
Etienne is a Principal Consultant employed by TNEI Africa since 2017 and is based in the Cape Town office in South Africa.
Etienne has a BEng (electrical and Electronic) degree from the University of Stellenbosch and has 10 years working experience in the power generation industry.
Etienne previously worked for the South African utility, Eskom for 5 years and AECOM one of the largest multi-disciplinary engineering firms for 3 years.
Diptargha specialises in modelling and analysis of transmission and distribution networks. His core expertise includes power system stability analysis, grid integration of renewable energy and dynamic demand response.
He has a strong academic background coupled with good understanding of new concepts in power networks e.g. microgrids, active network management, dynamic frequency support, point-of-load voltage control.
Gemma has over 14 years’ experience working in the Environmental Consultancy Sector. Since joining TNEI in 2007, Gemma has primarily worked on wind farm noise projects.
She has been involved with all stages of development for initial feasibility assessments, base-line surveys, impact assessments through to assisting with collating information for Appeals and compliance monitoring.
Zoë has a utilities background in generation and distribution, totalling 12 years. Zoë is able to draw on plant operations and asset management experience, as well as network planning, power systems analysis and generation integration.
With a passion for renewable energy and a post graduate qualification in sustainable energy systems, Zoë has been closely involved in South Africa’s Renewable Energy Independent Power Producer Procurement Programme and has experience in strategic and optimal grid integration of renewable generation at all voltage levels.
Senior Data Scientist
Gruffudd is a data scientist with considerable experience in mining, analysing, interpreting, predicting and visualising data. His academic background spans statistics, electrical engineering and physics, and his research has often bridged these disciplines.
This includes a PhD on the development of advanced time series models to reproduce the dynamics of wind resource availability on multiple spatial and temporal scales. He has strong expertise in stochastic power system modelling and the application of operational research methods to power system problems.
Vijay is a senior consultant with over 10 years’ experience in the power sector. His experience includes network compliance studies, industrial studies and project management.
At TNEI Vijay has managed a vast number of renewable & conventional generations, Oil & Gas, STOR & battery storage sites and metro station projects.
His professional experience includes various power systems analysis studies- load flow, short circuit, transient stability, protection coordination, harmonics, arc flash studies.
Rashid is an electrical engineer with over 16 years professional experience in working in the field of power systems both in the UK and Internationally.
He has been involved with power system studies including load flow, fault level analysis, harmonic studies, P28 and reactive power capability studies for a number of wind farms and solar parks. He also has experience of carrying out fault-ride through and dynamic reactive power and voltage control studies for a number of onshore and offshore wind farms using DigSilent and PSSe.
Jean Louis Rasolonjanahary
Jean-Louis has a broad range of experience in power systems studies including grid code compliance, insulation coordination and transient recovery voltage study.
Prior to joining TNEI, he spent more than twenty years professional experience in Electrical engineering including with ALSTOM, AREVA T&D and ALSTOM Grid where he held the position of Principal Research Technologist and gained the title Senior Expert in Power System and Electrical Machines.
Gemma is an IEMA Associate and has worked in the sector since 2014. She has supported the production and delivery of Environmental Statements, Environmental Reports and Environmental Appraisal documentation for onshore commercial projects, and offshore renewable energy projects.
Her experience in both areas has enabled Gemma to develop a broad understanding of onshore and offshore consenting regimes.
Senior Consultant and IPSA Lead
Gorby has over four years of experience working closely with Distribution Network Operators (DNOs) across the UK on many innovation & Business-As-Usual (BAU) projects.
He has a diversified skillset which in-cludes experience and expertise in project management, power systems studies and analysis and scripting in multiple coding languages.
David has 10 years experience within the energy sector from having worked for an energy organisation both in Southern Africa and in the United Kingdom.
His unique experiences in engineering design, installation and commissioning of projects, have afforded him the opportunity to enable practicable, technical and innovative solutions within the electrical distribution and power engineering discipline.
Jason works on noise related assessments for renewable energy developments. Since joining TNEI in 2013, he has primarily worked on wind farm noise projects (specifically site assessment, layout design, and noise and shadow flicker assessments), and his role involves the development of noise models, and the analysis of operational turbine data during compliance exercises (to understand better the conditions in which noise is an issue).
Rieghard is an electrical engineer with 10 years’ experience in the electrical utility and renewable energy consulting industry. He spent 7.5 years working for the South African utility, Eskom Distribution’s Operations and Maintenance department where he fulfilled various engineering and management roles. He was involved in initiating and implementing various maintenance and network improvement projects, network analysis, fault investigations, technical audits, compliance management and establishing and managing maintenance contracts. Rieghard also has more than 2 years’ experience performing and overseeing multidisciplinary owner’s engineering, technical due diligence and design services for renewable energy clients, including developers, investors and EPC Contractors across Sub-Saharan Africa and Australia. Rieghard is a registered Professional Engineer with the Engineering Council of South Africa and holds B.Eng and PhD(Eng) degrees in Electrical Engineering and an Electrical Engineer’s Government Certificate of Competency (Factories).
Mark’s work focuses mainly on the technical aspects of renewable energy developments including site finding, GIS mapping services, and various types of noise assessments.
Mark has provided GIS and CAD support for numerous projects at TNEI, including renewable energy, power systems, and residential and industrial developments.
Experience includes data management and analysis, site finding and feasibility assessments, site design, production of technical plans and figures, and general mapping services for the duration of a project.
Senior Software Engineer
Francesco is Senior Software Engineer at TNEI. He is a nuclear and energy engineer with 7 years of experience in the simulation field, including a 3-year PhD on safety simulation and development of nuclear reactor codes. He has a broad experience in research and development of complex multi-physics codes as well as testing and maintenance of large simulation tools.
He has a strong mathematical modelling and software development background, a special eye for multi-physics problems, good problem-solving skills and analytical thinking power.
Raghavendra has over 10 years of experience in the field of power systems and R&D and has catered to various customers in conventional power generation, renewables, transmission and bulk power consuming industries. He has in depth knowledge of steady state and dynamic modelling of power systems in power system analysis tools such as ETAP, NEPLAN, Powerfactory, PSS/E, PSCAD and MiPower.
Prior to joining TNEI Services Ltd. he has led several grid interconnections, islanding & load shedding, power quality and power system protection studies for industries, T&D utilities and developers.
Sarah is primarily focused on the statistical modelling and analysis of power systems. Her academic background includes engineering, statistics and operational research, and her research has combined elements of each discipline to investigate a variety of power and energy systems problems.
Sarah has also spent time working in policy, undertaking a secondment to the Cabinet Office to work on academic collaborations with policy makers for data science projects within government.
Mark has a proven track record of Network Modelling and since joining TNEI has become proficient at using DIgSILENT PowerFactory.
In addition to Mark’s power system modelling experience he has also been involved in a wide variety of innovation projects.
His most recent projects have allowed him to research area’s such as Blackstart via distributed energy resources (DER); the impact of high penetration renewable energy integration onto the electricity network and the use of non-synchronous renewable generation for ancillary services.
Lauren has experience modelling electrical systems both large and small scale. She also has an appreciation of the compliance requirements of a number of different grid codes.
Lauren also has a background in EHV system design and generation impact assessments. In additional to Lauren’s power system modelling and analysis experience, she has been involved in a number of innovation projects assessing the feasibility of emerging technology such as Green Hydrogen, Offshore MVDC arrays and the electrification of vessels
Max is primarily focused on mathematical modelling and data analysis. Max has developed a wide range of subsequent skills to contextualise and convey the impact of the subject under analysis through various mediums.
This is enveloped by his experience in full-stack development, providing a foundation to design and launch interactive and intuitive means of data visualisation.
Kevin has been involved in network planning projects through secondment with Scottish Power Distribution as well as a number of business plan assurance work with a transmission operator.
His key experience includes fault level and load flow analysis of connecting generators, fault level studies of distribution networks, distribution network modelling using DigSilent and business plan assurance.
Ewan joined TNEI in August 2016. Since graduating from his academic studies and joining TNEI, Ewan has specialised in Environmental Acoustics work but has also drawn on a range of environmental and engineering experiences including environmental impact assessments, site finding and feasibility assessments and GIS mapping.
Ewan has worked on projects in sectors including onshore wind, offshore wind, oil & gas, residential, port services, conventional energy and low carbon transport.
Anrich is an electrical engineer specialising in the field of power systems. He holds a Bachelor’s (BEng) degree in Electrical & Electronic Engineering and a Master’s (MEng) degree (Cum Laude) in Electrical Engineering. He is registered as a PrEng Candidate with ECSA and is also a SAIEE member.
His knowledge areas span the fields of power generation, transmission and distribution, with a specialised focus in the renewable energy domain. Anrich pursued his Master’s degree in alignment with his passion for renewables and the grid integration thereof. His work has led to the publication of multiple conference papers. He has previous working experience as a consultant and has served multiple South African municipal power utilities as clients. He is proud to be joined with the team of power systems experts at TNEI in providing specialist energy consulting services to the international renewable and conventional energy sectors.
Jack has experience in GIS and CAD, producing figures and plans for a range of projects for submission as part of planning applications, including onshore wind, offshore wind, gas peaking plants, battery storage, solar and electric vehicle charging.
He has conducted a number of site finding and feasibility assessments, as well as inputting into Environmental Impact Assessments
Alex is involved in grid connections projects, regularly advising developers on grid connection strategies, and project construction timescales and costs for both distribution and transmission connections.
She has worked on a number of capacity searches across DNO areas, covering different technologies and connection capacities. She often liaises with DNOs and NGET to help progress projects and has helped clients with connection applications.
Her focus has primarily been on onshore wind but she has worked on solar, battery storage, marine energy and EV projects.
Obinna is involved in various power system studies including load flow, short circuit, P28 power quality (transformer inrush, voltage step change, flicker) reactive capability, network capability assessment, wind farm constraint analysis and calculating network use charges for distribution companies.
He also has expertise in scripting in multiple languages for automation of power system studies, and therefore is involved in developing and adapting software tools for more complex power system studies. Obinna holds a PhD in Power Systems Engineering.