Co-Founders

Mr. Frank Baker is a Co-Founder and Managing Partner of Siris. Together with Peter Berger and Jeffrey Hendren, he launched Siris in 2011 and helped establish the Firm’s investment strategy, which focuses on driving value creation in mature technology companies with mission-critical products and services, facing industry changes or other significant transitions. Since its founding, Siris has raised more than $5.9 billion of cumulative capital commitments over three institutional funds, and Mr. Baker has helped oversee the Firm’s platform equity investments, in addition to non-control investments. Prior to founding Siris, Mr. Baker was a Managing Director at Ripplewood Holdings LLC, a global private equity firm. He started his career in the mergers and acquisitions group of Goldman Sachs and earned an M.B.A. from Harvard Business School and a B.A. in Economics from the University of Chicago. Mr. Baker currently serves as a trustee of the University of Chicago and has been a major supporter of the university’s New Leaders Odyssey Scholarships. Mr. Baker is chairman of Robert F. Kennedy Human Rights, and a board member of Sponsors for Educational Opportunity.

Frank Baker Pays Off Tuition For Spelman College Graduates

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Frank on Measured Growth

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Frank on Siris' Investment Strategy

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Frank's Perspective on Team Building

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Mr. Peter Berger is the Chairman and Co-Founder of Siris, bringing more than 50 years of experience across private equity, banking, and consulting—over 30 of those years as a direct private equity investor in leadership roles.

As Chairman, Mr. Berger provides strategic oversight and stewardship, guiding the firm’s long-term vision, governance, and investment discipline. He works closely with the leadership team to ensure the continued success of Siris’s mission to create lasting value through its investment approach.

Alongside Frank Baker and Jeffrey Hendren, Mr. Berger co-founded Siris in 2011 and, as a Managing Partner, was instrumental in shaping the firm’s distinctive investment philosophy. Across Siris’s portfolio companies, he has served as Chairman or director and has led multiple Audit and Risk, as well as Human Capital Committees.

Before founding Siris, Mr. Berger was a founding member and Managing Director at Ripplewood Holdings LLC, a global private equity firm. Earlier in his career, he served as Senior Partner and Global Head of the Corporate Finance Group at Arthur Andersen and as a Managing Director at Bear Stearns’ investment bank.

Mr. Berger holds an M.B.A. from Columbia Business School and a bachelor’s degree from Boston University. He has been a guest lecturer at Columbia Business School and previously served on the Board of Directors at Jazz at Lincoln Center, where he chaired the Finance Committee.

Mr. Jeffrey Hendren is a Co-Founder and Managing Partner of Siris. Together with Frank Baker and Peter Berger, he launched Siris in 2011 and helped establish the Firm’s investment strategy, which focuses on driving value creation in mature technology companies with mission-critical products and services, facing industry changes or other significant transitions. Since its founding, Siris has raised more than $5.9 billion of cumulative capital commitments over three institutional funds, and Mr. Hendren has helped oversee the Firm’s platform equity investments, in addition to non-control investments. Prior to founding Siris, Mr. Hendren served as a Managing Director at Ripplewood Holdings LLC, a global private equity firm. Mr. Hendren started his career at Georgia Pacific and was a member of the mergers and acquisitions group of Goldman Sachs. Mr. Hendren earned an M.B.A. from Harvard Business School and a B.Sc. from Indiana University.