Steven Antonson

Chief of Staff

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New York

Aaron Goldberg

Chief Talent Officer

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New York

Michael Bilka

Director

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New York

Sean Menon

Managing Director

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New York

Mark Lacana

Managing Director

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Boston

Patrick Costello

Controller

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Boston

Lorena Richards

Senior Controller

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Boston

Rebecca McGue

Senior Controller

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Boston

Andrew Kesler

Senior Controller

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Boston

Hugh Simpson

Director

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London

Justin Bach

Director of Fund Accounting

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New York

Adam Weiss

Managing Director

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New York

Molly Barron

Director

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Denver

Alex Seang

Senior Manager

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Los Angeles

Michael McCurley

Director

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New York

Melissa Foley

Senior Controller

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Boston

Patricia Danier

Senior Controller

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Boston

Jennifer Fichera

Director

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Boston

Paul Winters

Managing Partner

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Boston

John Collins

Managing Partner

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Boston

Charlie Chipchase

Managing Director

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London

Josh Cooper

Managing Director

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New York

Robert Kim

Director

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New York

Whitney Kim

Director

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Los Angeles

Peter Haskopoulos

Managing Partner

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New York

Stephen Coats

Managing Partner

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New York

John Collins

Most recently, John was a Partner and Chief Financial Officer of Denham Capital Management LP, a leading energy and resources global private equity firm. He brings over 30 years of private equity experience to Petra. In his role at Denham, John was responsible for the business operations, accounting and administrative functions of the firm, its worldwide subsidiaries and its private equity funds. John was a member of Denham’s Valuation Committee. Prior to joining Denham in 2005, he served as the Chief Financial Officer of Capital Resource Partners and was a Manager in the fund accounting group at Advent International Corporation. John received a Bachelor of Science from Norwich University, where he currently serves on the Board of Trustees, and a Master of Business Administration from Salem State College.