Specialist Energy
Consultancy in the USA   

TNEI is an independent specialist energy consultancy providing technical, strategic, environmental and consenting advice to organisations operating within the conventional and renewable energy sectors  for over 40 years.

Contact us today to see how we can assist your energy project..


TNEI USA launched in 2022 and offers Utilities, Renewables and Sustainability Engineering and Advisory Services to Clients from our US offices.  Whether we serve your organization and projects with a domestic team or a strategic team made up of highly experienced US and international Engineers and Subject Matter Experts from TNEI offices in the UK, Ireland and South Africa.

A wealth of in-depth experience and industry knowledge.

TNEI USA is committed to bringing our in-depth experience in Offshore Wind, Power System Services and many other cutting-edge Renewable Technology, Sustainability Services and industry knowledge to guide your projects successfully, start to finish. 

Helping achieve offshore wind targets

With TNEI’s experience of working on every major offshore wind in Great Britain, we believe we can help developers achieve the country’s offshore wind targets.
TNEI USA is a small, but growing team of talented engineers supported by our offices in the UK, Ireland and South Africa. 

Our Services In The US

Strategic and regulatory energy advice

Transmission grid capacity and interconnection analysis

Concept/front-end design of offshore /onshore renewables

Project pre-construction and operational permitting

Power system modelling and studies

System protection and co-ordination studies

Industrial Power System design and studies

Renewable plant life cycle cost modelling and optimisation

Technical due diligence

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