
Corporate M&A
Energy
Oil & Gas
Infrastructure
David H. Sweeney is a partner at Clifford Chance in Houston, where he leads the oil and gas group. With extensive experience in energy, corporate transactions, and infrastructure, David has advised on transactions exceeding US$100 billion across more than 30 countries. His expertise includes mergers and acquisitions, financial restructurings, and capital deployment. David is a recognized author and speaker on oil and gas topics, having written comprehensive books on joint operating agreements and farmout agreements. He has held leadership roles in the Institute for Energy Law and the Association for International Energy Negotiators.
Mergers & Acquisitions
Restructuring and Financial Services
Corporate Transactions and Operations
Joint Ventures and Operational Agreements

Partner, Global Co-Head of the Energy & Resources Sector
2025 – Unknown
Partner
2023 – 2025
Partner
2016 – 2023
Partner
2014 – 2016
M&A
1 min
Associate General Counsel & Chief Compliance Officer
2013 – 2014
Vice President Legal & General Counsel
2012 – 2013
Associate
2005 – 2012