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James Chambers Joins Summer Street Capital

James Chambers has joined Buffalo, N.Y.-based Summer Street Capital Partners as an operating partner. He previously was co-founder of management advisory and investment firm Conundrum Partners. Before that, he was president of business services for Quest Diagnostics. 



Summer Street Capital Partners, a Buffalo, New York-based private equity fund, announced that James D. Chambers has joined Summer Street as an Operating Partner.

In 2001, Chambers co-founded Conundrum Partners, a management advisory and investment firm. Previously, he served as the President of Business Services for Quest Diagnostics Inc., where he led key functions in the company’s turnaround and growth strategy. His management of Quest’s integration of SmithKline Beecham Clinical Laboratories resulted in a more than $2 billion increase in market value for the combined company. Prior to joining Quest Diagnostics, Chambers held senior management positions in finance and corporate development at Corning, Inc., Vista Chemical and Conoco, Inc.

“Summer Street is fortunate to be able to add Jim’s many talents to our team of experienced partners,” noted Mike McQueeney, managing partner. “His track record of driving operational excellence, advising companies experiencing rapid growth and acquiring and integrating companies positions Jim as an outstanding resource for our portfolio companies.”

Chambers will join current operating partners Doug VanOort, John Burgess and Michael Serventi in reviewing prospective investments and providing operational resources for Summer Street’s portfolio companies.

“Jim has over 25 years of experience in diverse industries. He is a results-oriented leader with a proven track record in challenging environments that require innovation and analytical problem-solving,” McQueeney added. “With a passion and aptitude for international challenges, Jim has a unique global perspective and has demonstrated remarkable success in leading change management, integrating acquisitions and driving growth.”

Chambers earned an MBA in Finance from Southern Methodist University, a Masters degree in International Management with Distinction from Thunderbird’s American Graduate School of International Management, a BA in History and Political Science from Dickinson College, and graduated from Middlebury College’s Summer German Language School with Distinction.


Summer Street Capital Partners LLC, founded in 1999, is a Buffalo, NY-based private equity fund with approximately $300 million of committed capital focused on investing in small to mid-market companies. The firm invests alongside talented managers, bringing capital and many other resources to support acquisitions and aggressive growth strategies. Summer Street’s investors include leading pension funds, insurance companies and banking institutions. Summer Street’s investments support management buy-outs, family transitions, corporate divestitures, growth financings and recapitalizations. The investment team is complimented by a team of experienced operating partners who are integrally involved in assisting portfolio companies. Please visit for additional information.