
Simmons & Simmons advises on complex, cross-border oil and gas mandates, with a strong focus on transactions, project development, financing, and regulatory work. The team is well-versed in guiding clients through major projects, financings, and commercial and supply agreements in Europe, Africa, and Asia, among other markets. Iain Duncan heads the practice, overseeing strategic mandates across the sector. Patrick Wallace regularly advises governments, investors, and energy companies on joint ventures, M&A, LNG and pipeline developments, and project agreements. Owing to his 'huge experience', Andrew Petry is a key contact on project finance mandates, while Joanne Elson brings additional project development and finance knowhow.
Legal 500 Editorial commentary
Testimonials
Collated independently by Legal 500 research team.
'Experienced team, solving efficiently complicated legal matters.'
'Super responsive, knowledgeable, and above all practical.'
'Andrew Petry has huge experience and a client friendly approach.'
'Patrick Wallace is extremely experienced, has an in-depth knowledge and practical skills, provides valuable solutions on complicated legal cases.'
Key clients
- Pantheon Resources
- Government of Zimbabwe
- African Legal Support Facility
- Government of Kenya, State Department for Petroleum and Energy and Petroleum Regulatory Authority (EPRA)
- Alro S.A.
- Gate terminal B.V.
- Stone City Energy B.V.
- Siemens Energy Global GmbH & Co. KG
- Électricité de France S.A.
- Nebras Power Q.P.S.C
- QuWatt B.V.
- HM Government
Work highlights
Advised Stone City Energy, EDF, Nebras and Siemens Energy on the €1.3bn development and financing of a 1.56GW CCGT plant in Uzbekistan.
Advising Government of Kenya (Ministry of Energy & Petroleum) and subsequently advising EPRA (the Kenyan energy regulator) on negotiations with Tullow, Africa Oil and TotalEnergies.
Lawyers
Leading partners
The strongest partners in their field, leading on market-leading deals and endorsed by peers and clients alike.

Practice head
Iain Duncan
Other key lawyers
Andrew Petry; Patrick Wallace; Joanne Elson