Glenn Kangisser

Glenn Kangisser is a leading lawyer in the offshore, oil and gas, and shipping industries, with a focus on upstream exploration and production and the transportation of oil and gas. He advises clients on projects and disputes throughout the lifecycle of a drilling unit, from design and construction to operations and maintenance, and from disposition, conversion, or recycling.

Glenn combines his extensive experience and market knowledge with a pragmatic approach to help clients achieve commercial solutions, whether by negotiating contracts, minimizing the risk of disputes, or resolving them through litigation or arbitration. He has represented clients in the English High Court and in arbitrations under various rules, including LCIA, LMAA, and ICC. His practice is truly international, covering the UKCS, U.S. Gulf of Mexico, West Africa, Brazil, the Middle East, and the Far East.

Glenn has handled some of the largest and most significant cases in the offshore drilling sector. He led his team in obtaining a London arbitration award of over US $400 million for a European drilling contractor client in a dispute with a South Korean shipyard over the termination of a drilling rig construction contract. He also secured an English High Court judgment of more than US $270 million, plus interest and expenses, for Seadrill Ghana Operations Ltd. in a force majeure case relating to the termination of a drilling contract. Glenn has also been involved in some of the most complex and high-profile offshore drilling projects in the last two decades.

Glenn heads Haynes Boone's oil and gas team in London and is recognised in the Chambers UK 2026 Guide for Energy & Natural Resources: Oil & Gas. Chambers notes:
"Glenn Kangisser has a strong customer focus and consistently demonstrates a strong understanding of our business and its critical focus points."

He is also recommended by The Legal 500 as a specialist in the space with exploration and production as his key focuses. Clients praise Glenn for his "unrivalled knowledge and experience" and his team for being "true experts in the field.", Clients note:
“The team has significant experience in the oil and gas sector, both in the U.K. and abroad, and their incisive, helpful and prompt response to queries is always appreciated.” 
“Glenn Kangisser and Fiona Cain are always quick to respond with helpful advice. Their experience in the sector means they can be pragmatic as well as providing legal solutions for the situations you face.”

Glenn has been featured in various mainstream and industry publications, including the Financial Times.