Key TNEI contacts

Rachel Hodges

Managing Director

Rachel has been at TNEI since 2005 and has over 15 years’ experience of working in the power and energy sector covering major project design and specification through to infrastructure planning. She has strong design, development, investigation and project management skills with considerable experience in business development, contract management, CDM and managing multi-functional teams with diverse skills and experience.

In her role as Managing Director, Rachel is responsible for the strategic direction of TNEI, supporting our existing clients throughout their projects. She is the main point of contact with our strategic partners in various sectors, enabling us to leverage off their experience and knowledge in international and alternative energy markets.

Rachel is the main contact for companies looking to discuss strategic partnerships, opportunities and bespoke, unusual or multi-disciplinary projects.

Email Rachel

Nilanga Jayawarna

Operations Director

Nilanga Jayawarna

Nilanga is an electrical engineer with over 11 years of experience in both power systems and power electronics studies. She has a PhD in electrical engineering and a strong background in MicroGrids and distribution generation networks.

She has extensive experience in modelling of power systems and control systems, a good knowledge of power system earthing and protection, electrical machines and HVDC applications and control. She is a strong team player with proven leadership skills.

Email Nilanga

James Mackay

Head of Technical Services

James Mackay

James manages the Site Services team, which provides a range of services including noise assessment, GIS / CAD mapping, shadow flicker assessments and soil resistivity measurements.

Since joining TNEI in 2006, James has developed a detailed knowledge of wind farm noise assessments and has worked on over 4 GW of onshore wind projects from initial site finding and feasibility assessment through to post construction compliance monitoring and complaints investigation. In 2013/2014 James was involved in the drafting of Good Practice Guidance for wind farm noise assessment for the Institute of Acoustics (IOA GPG). 

The nine strong Site Services team has provided expert witness services in relation to wind farm noise at over 30 Public Inquiries and wider technical support for projects in the renewable energy, transmission and distribution, oil and gas, residential and industrial sectors.

James is the main contact for noise assessments, expert witness services, GIS / CAD mapping and shadow flicker assessments.

Email James

Jason McGray

Principal Consultant, Planning and Consenting

Jason McGray heads up TNEI's planning and consenting team. He is a Chartered Environmentalist,  full member of the Institute of Environmental Management and Assessment and a Registered EIA Practitioner. Jason has extensive experience of coordinating, preparing and reviewing Environmental Impact Assessments and in gaining planning consent for a range of energy related projects. In addition, Jason has undertaken environmental due diligence and provided specialist input into strategic and regulatory projects working alongside TNEI's technical and engineering experts. He has supported complex projects for both private and public sector clients including Ofgem and the Crown Estate. 

Jason's wider experience includes detailed feasibility assessment, environmental permitting, socio-economic impact assessment, delivery of programmes of community engagement and financial modelling. 

Email Jason

Charlotte Higgins

Network and Innovation Team Co-Lead

Charlotte has an extensive background in the energy sector with over 19 years of experience in the field of systems analysis, particularly in power systems applications. A particular strength of Charlotte's is her ability to provide specialist knowledge to cross function projects where a wide range of stakeholders need to be consulted and their requirements balanced to find the best technical and commercial solution. She has expertise in technical, economic and regulatory considerations for the development of transmission and distribution networks including integration of renewable generation, smart grids, HVDC systems and low carbon technology. 

Email Charlotte
 

James Hollender

Developer Support Lead

James is a Chartered Civil Engineer with over 14 years’ experience in the power sector having been involved in the assessment, design and construction of over 3GW of projects. Since 2004 James’ work has focussed on renewable energy and power including onshore and offshore wind, solar, STOR, transmission and distribution and battery storage projects. He has worked on site as Owner's Engineer, Bank's Technical Advisor and Principal Contractor. James is a Certified Member of the Association for Project Safety and has successfully discharged the CDM roles of Planning Supervisor, CDM-Coordinator and Principal Designer on several projects.

James leads the developer support team which provides clients with the advice and support needed to take their project from conception through to construction.

Skills within the team include Environmental expertise, Town Planning, EIA, GIS, Grid Connections, Electrical engineering , Civil Engineering and health and safety advice.

Email James

Stephanie Hay

Network and Innovation Co-Lead

Stephanie is a Principal Consultant and Networks & Innovation Team Lead for TNEI’s Scottish office in Glasgow. She has 11 years of experience in the power industry including a 4-year PhD on active network management and control of distribution networks and 7 years as a power system consultant. She has significant experience in electrical system studies, analysis and software packages.  

She is practiced in undertaking grid connection studies for network planning and impact assessments on networks ranging from large trans-continental transmission systems to small island distribution networks. 

Stephanie’s main focus in recent years has been providing technical and market expertise on emerging technologies and delivering concept, innovation and strategy projects for large industry organisations, including several studies for Scottish Enterprise on MVDC, Energy Systems, Niche Transport Applications and Green Hydrogen. This expertise drives the development of the work and the team in Scotland such that TNEI are well-placed to support the ambitions of the energy industry.

Email Stephanie

Johan Smith

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.

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Dieter Gütschow

International Lead

Dieter recently joined TNEI in Manchester as a Specialist Consultant in the Networks and Innovation division. He has more than 20 years of electrical engineering-, international project management- and consulting experience in various areas of the electrical industry. This includes managing large wind farm construction projects, distribution network reliability modelling and planning, asset management, smart grid initiatives, and techno-economic feasibility studies for network expansion and renewable projects.

Dieter’s career started at Eskom, South Africa’s national power utility, where he was a chief engineer responsible for, amongst others, the telecommunications and SCADA systems of the distribution and transmission power networks.

Subsequently, as a consultant he led several assignments and teams on a wide range of subjects, the most notable of which was the development of an operational strategy for Eskom, the development of an asset management strategy, and a new planning and substation design standard to improve network reliability. Other assignments he managed include the development of a 30-year energy forecasting model for Transnet, the feasibility study and preliminary design of a 400kV transmission network in Tanzania, and the development of a smart metering pilot project in Cyprus.

More recently Dieter was a project manager for an EPC company responsible for the design, engineering, and construction of the electrical balance of plant, including 400/132 kV substations and 132kV power lines, for two large wind farms in South Africa.

Dieter has technical, management consulting, and project management experience in South Africa, Botswana, United Kingdom, Cyprus, Lithuania, the Netherlands and Germany.

Email Dieter

Jonathan Oguntona

Grid Connections Lead

Jonathan is a Senior 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.

Email Jonathan