Key Contacts

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.

Dr Charlotte Higgins has an extensive background in the energy sector with over 19 years of experience.

She has expertise in technology, economic and regulatory considerations for the future development of transmission and distribution networks including integration of renewable generation, smart grids, HVDC systems and low carbon technology. Charlotte also has a strong track record in project management.

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.

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.  

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. 

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. 

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 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. 

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. 

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.

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. 

Kasia has over five years’ experience working within the engineering consultancy environment where she gained experience predominantly in wind farm and highways projects related to ground investigation and earthworks construction. Kasia has experience on a wide variety of projects including both site and office based assignments. She has extensive experience in design, scoping, procurement and supervision of ground investigation. She also spent a year overseeing earthworks construction on a wind farm project. Kasia has prepared numerous ground models, geotechnical desk studies, mining assessments, Preliminary Sources Study Reports (PSSR), Geotechnical Interpretative Reports (GIR), Construction Quality Assurance Reports (CQA), Ground Investigation and Earthworks Specifications, Foundation and Borrow Pit Assessments and various risk assessments.

Since joining TNEI Kasia has been involved in several wind farm projects but also undertook numerous GIS site finding, feasibility and constraints mapping assessments. She has also experience in GIS and CAD, producing drawings for a range of projects. 

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).

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.

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. 

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

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.

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.

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.

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. 

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