Sun Capital Partners Inc., a private investment firm focused on defensible businesses in growing markets with tangible performance improvement opportunities, has promoted three executives who currently serve as members of the executive and investment committees alongside the firm’s two founders. Senior managing director and head of private equity North America, M. Steven Liff was named senior partner, and senior managing directors, operations Bruce Roberson and Tim Stubbs were promoted to partner.

“We are very happy to welcome Steve, Bruce and Tim as Partners of Sun Capital,” said Sun Capital founders and co-CEOs Marc Leder and Rodger Krouse. “All three have been instrumental to our success over the years, have proven to be tremendous colleagues and mentors to team members across the firm, and acted as true partners in developing and executing the firm’s overall strategy. These promotions recognize the critical roles they play at Sun Capital today and their continued contributions in the future.”

Liff, who joined Sun Capital in 2000, has applied his leveraged finance and mergers and acquisitions experience to lead deals and is a member of Sun Capital’s investment committee, which approves all investments made by the firm. He also manages the North American transaction team, including offices in Boca Raton, Los Angeles, and New York City. Prior to joining Sun Capital, Liff worked at NationsBank and Bank of America commercial finance, focusing on marketing, underwriting, and closing new leveraged finance transactions.

Roberson joined the firm as a managing director, operations in 2015 and oversees Sun Capital’s North American operations teams and is a member of Sun Capital’s Investment Committee. He was previously president and CEO of privately-held PSC Industrial Services Group for 10 years, served as an executive at Safety-Kleen Systems and was a senior partner at McKinsey & Co. where he worked for 19 years.

Stubbs joined Sun European Partners, the European adviser to U.S.-based Sun Capital Partners, Inc., in 2011 and oversees the European operations teams and is a member of Sun Capital’s investment committee. Prior to joining Sun European he was President and CEO of the Sapa Group in Stockholm, a $5 billion global aluminum products business, and also served as CEO of Indalex, an aluminum extrusion business and a former Sun Capital affiliated portfolio company.