Sean O'Neill
Founder at Old Ironsides Energy LLC
Profile
Prior to forming Old Ironsides Energy in 2013, Mr. O’Neill spent nine years with Liberty Energy Holdings, including as a Senior Managing Director.
He was responsible for sourcing, structuring, and managing the firm’s private equity and oil and gas working interest portfolios.
From 2000 to 2004, Mr. O’Neill served as a Senior Associate in the Natural Resources group at Bank of America and its predecessor, FleetBoston Financial.
Mr. O’Neill began his career in 1998 with Dynegy Marketing and Trade.
Mr. O’Neill is a member of the Investment Committee of Old Ironsides Energy and currently serves on the board of directors of several Old Ironsides portfolio companies as well as the board of directors of the Independent Petroleum Association of American.
Mr. O’Neill is also on the board of the Boston Children’s Museum and the Board of Overseers of Boston Children’s Hospital.
Mr. O’Neill holds a bachelor’s degree in economics from the University of Texas at Austin and an MBA from the F.W.
Olin Graduate School of Business at Babson College.
Sean O'Neill active positions
| Companies | Position | Start |
|---|---|---|
Old Ironsides Energy LLC
 Old Ironsides Energy LLC Investment ManagersFinance Old Ironsides Energy LLC (Old Ironsides Energy) is a private equity firm founded in August 2013. The firm is headquartered in Waltham, Massachusetts. | Founder | 2013-07-31 |
Constitution Acquisition Corp.
 Constitution Acquisition Corp. Financial ConglomeratesFinance Constitution Acquisition Corp. operates as a blank check company. It is formed for the purpose of effecting a merger, share exchange, asset acquisition, share purchase, reorganization or similar business combination with one or more businesses or entities. The company was founded on March 12, 2021 and is headquartered in Waltham, MA. | Director/Board Member | - |
Independent Petroleum Association of America
 Independent Petroleum Association of America Industrial SpecialtiesProcess Industries The Independent Petroleum Association of America manufactures oil and natural gas. The non-profit company is based in Washington. Barry Russell has been the CEO of the American company since 1980. | Director/Board Member | 2010-12-31 |
Former positions of Sean O'Neill
| Companies | Position | End |
|---|---|---|
Liberty Energy Holdings LLC
 Liberty Energy Holdings LLC Oil & Gas ProductionEnergy Minerals Liberty Energy Holdings LLC focuses on oil and gas exploration, development and property acquisition. The company is headquartered in Boston, MA. | Private Equity Investor | 2012-12-31 |
| MERRILL LYNCH PREFERRED CAPITAL TRUST I | Corporate Officer/Principal | 2003-12-31 |
| DYNEGY INC | Corporate Officer/Principal | 1999-12-31 |
Boston Children's Museum
 Boston Children's Museum Other Consumer ServicesConsumer Services Boston Children's Museum operates museum. The firm offers exhibits and programs designed for children and families. The company was founded in 1913 is headquartered in Boston, MA. | Director/Board Member | - |
Training of Sean O'Neill
| Babson College | Masters Business Admin |
| The University of Texas at Austin | Undergraduate Degree |
Experiences
Positions held
Connections
1st degree connections
1st degree companies
Male
Female
Members of the board
Executives
Linked companies
| Listed companies | 1 |
|---|---|
| MERRILL LYNCH PREFERRED CAPITAL TRUST I | Finance |
| Private companies | 6 |
|---|---|
Old Ironsides Energy LLC
Old Ironsides Energy LLC Investment ManagersFinance Old Ironsides Energy LLC (Old Ironsides Energy) is a private equity firm founded in August 2013. The firm is headquartered in Waltham, Massachusetts. | Finance |
Dynegy, Inc.
 Dynegy, Inc. Electric UtilitiesUtilities Dynegy, Inc. is a holding company, engages in the production and sale of electric energy, capacity, and ancillary services. It operates through the following segments: PJM, NY/NE, ERCOT, MISO, and CAISO. The PJM segment comprises of power generation facilities located in Ohio, Pennsylvania, Illinois, Virginia, West Virginia, and New Jersey. It offers wholesale electricity and provides transmission planning. The NY/NE segment consists of power generation facilities located in Massachusetts, Connecticut, Maine, and New York. It dispatches power plants to meet system energy and reliability needs and settles physical power deliveries. The ERCOT segment serves the state of Texas over a high-voltage transmission system. The MISO segment includes three power generation facilities in Illinois. The CAISO segment contains two power generation facilities located in California. The company was founded in 1984 and is headquartered in Houston, TX. | Utilities |
Liberty Energy Holdings LLC
Liberty Energy Holdings LLC Oil & Gas ProductionEnergy Minerals Liberty Energy Holdings LLC focuses on oil and gas exploration, development and property acquisition. The company is headquartered in Boston, MA. | Energy Minerals |
Constitution Acquisition Corp.
Constitution Acquisition Corp. Financial ConglomeratesFinance Constitution Acquisition Corp. operates as a blank check company. It is formed for the purpose of effecting a merger, share exchange, asset acquisition, share purchase, reorganization or similar business combination with one or more businesses or entities. The company was founded on March 12, 2021 and is headquartered in Waltham, MA. | Finance |
Independent Petroleum Association of America
Independent Petroleum Association of America Industrial SpecialtiesProcess Industries The Independent Petroleum Association of America manufactures oil and natural gas. The non-profit company is based in Washington. Barry Russell has been the CEO of the American company since 1980. | Process Industries |
Boston Children's Museum
Boston Children's Museum Other Consumer ServicesConsumer Services Boston Children's Museum operates museum. The firm offers exhibits and programs designed for children and families. The company was founded in 1913 is headquartered in Boston, MA. | Consumer Services |
- Stock Market
- Insiders
- Sean O'Neill
