Our Team

Joshua D. Bresler is a managing director at Thomas H. Lee Partners. Prior to joining Thomas H. Lee Partners, Mr. Bresler worked at Goldman, Sachs & Co. in its Investment Banking Division’s Financial Institutions Group.

Mr. Bresler is currently a director of Phytech Ltd. and System One Holdings, a board observer at Guaranteed Rate and a member of the firm’s investment team on The Dun & Bradstreet Corporation. His prior directorships include First BanCorp (Puerto Rico), GCA Services Group, Michael Foods, Sterling Financial Corporation, CompuCom Systems, Inc., and Systems Maintenance Services, Inc.  Other prior investment experience at THL includes FIS, Warner Music Group and Houghton Mifflin Co.

Mr. Bresler holds an A.B. in Economics, magna cum laude, from Harvard University and an M.B.A. from Harvard Business School.

Mr. Bresler serves on the Board of Directors of Charlestown Nursery School as Treasurer and on the Board of Directors of Charlestown Little League and on the Concussion Legacy Foundation’s Boston Advisory Board.

Jim Carlisle is a Managing Director at Thomas H. Lee Partners.  Prior to joining Thomas H. Lee Partners, Mr. Carlisle worked at Goldman, Sachs & Co. in the Financial Institutions Group.

Mr. Carlisle is currently a director of Autostore, Auction.com, Fortna, Material Handling Systems and a board observer at Univision Communications. His prior directorships include Achievement Technologies, Agencyport Software, iHeartMedia, Clear Channel Outdoor Holdings, Front Line Management Companies and Ten-X Commercial.

Mr. Carlisle holds a B.S.E., summa cum laude, in Operations Research from Princeton University and an M.B.A. from Harvard Business School.

Mr. Carlisle serves as a member of the Board of Directors of The Massachusetts Eye and Ear Infirmary and is an active contributor to the National Park Foundation.

Max Doubenski is a vice president at Thomas H. Lee Partners.  Prior to joining Thomas H. Lee Partners, Mr. Doubenski co-founded AirWorks, a provider of aerial mapping services to the civil engineering industry. Before business school, Mr. Doubenski worked at Goldman Sachs, where he evaluated equity investment opportunities in the industrials space.

Mr. Doubenski holds a B.A., with honors, in Business Economics from Brown University and an M.B.A. from the Sloan School of Management at MIT.

Timothy R. Ferris is a senior associate at Thomas H. Lee Partners. Prior to joining Thomas H. Lee Partners, Mr. Ferris worked as an analyst in the Financial Institutions Group at Morgan Stanley in New York.

Mr. Ferris holds a B.A. in Economics, magna cum laude, from Boston College.

James Gammill is an associate at Thomas H. Lee Partners.  Prior to joining Thomas H. Lee Partners, Mr. Gammill worked as an analyst in the Technology, Media & Telecom Group and an associate in the Office of the Chairman at Goldman Sachs in New York.

Mr. Gammill holds a B.S. in Economics from the Wharton School at the University of Pennsylvania.

Eliza Guild is an associate at Thomas H. Lee Partners.  Prior to joining Thomas H. Lee Partners, Ms. Guild worked as an analyst in the Exclusive Sales M&A Group at Barclays in New York.

Ms. Guild holds a B.A. in Economics from Harvard University.

Mr. Kaczmarek is a director at Thomas H. Lee Partners.  Mr. Kaczmarek is currently a director of Auction.com, AutoStore, Fortna and Material Handling Systems, Inc.  His prior directorships include Ten-X Commercial.

Prior to joining Thomas H. Lee Partners, Mike worked as a vice president of Rockbridge Growth Equity, where he worked to source, evaluate and execute transactions and was an active portfolio company board member.  Mr. Kaczmarek also worked as an associate at Pamlico Capital where his work was focused in the business & technology services and communications industries. Prior to Pamlico Capital, Mike worked in investment banking with Wachovia Securities where he focused on mergers and acquisitions, equity financings and leverage finance transactions for both public and private companies in the technology, media & telecom industries.  Mr. Kaczmarek serves on the Advisory Board for MassRobotics.

Mr. Kaczmarek holds a B.S. in Finance from the Eli Broad College of Business at Michigan State University.

Camyar Matini is an associate at Thomas H. Lee Partners.  Prior to joining Thomas H. Lee Partners, Mr. Matini worked as an investment banking analyst in the Industrials Group at Lazard Frères & Co. in New York.

Mr. Matini holds a B.A. in Economics from Yale University.

Mr. Matini is actively involved in the Boston chapter of Big Brothers Big Sisters of America.

Gaurav Mittal is a managing director at Thomas H. Lee Partners.  Mr. Mittal leads business development related activities including sourcing strategy, market-facing relationships and development of opportunities for the Automation Fund.

Prior to joining Thomas H. Lee Partners, Mr. Mittal was a managing director in the Global Industrials Group at Credit Suisse in New York, where he focused on the coverage of large-cap multi-industry and industrial technology companies.  During his nearly decade long career at Credit Suisse, Mr. Mittal was involved in developing corporate relationships and executing a wide range of M&A, equity and debt offerings.

Mr. Mittal holds a B.Tech. in Computer Science from Punjab Technical University, India and an M.B.A. from Duke University.

Kevin Mok is an associate at Thomas H. Lee Partners.  Prior to joining Thomas H. Lee Partners, Mr. Mok worked as an analyst in the Technology, Media & Telecom Group at Goldman Sachs in New York.

Mr. Mok holds a B.S. in Management with a concentration in Finance, summa cum laude, from the Carroll School of Management at Boston College.

Mr. Mok is actively involved in the Boston community with Social Venture Partners, the Young Professionals Committee of Goodwill Massachusetts, and Big Brothers Big Sisters.

Trevor Owens is a business development manager at Thomas H. Lee Partners focusing on Automation.  Prior to joining Thomas H. Lee Partners, Mr. Owens was a marketing associate at J.P. Morgan Securities where he was responsible for the business development efforts of a private equity and venture capital coverage group.  Prior to that, Mr. Owens founded OpusVR, an SAAS platform enabling artists and art galleries to drive mobile commerce through virtual reality.

Mr. Owens holds a B.A. in Economics from Saint Michael’s College.

Jason Peng is an associate at Thomas H. Lee Partners.  Prior to joining Thomas H. Lee Partners, Mr. Peng worked as an analyst in the Global Natural Resources Group at Barclays in New York.

Mr. Peng holds a B.S. in Applied Economics from the Wharton School at the University of Pennsylvania.

Alec S. Ren is an associate at Thomas H. Lee Partners. Prior to joining Thomas H. Lee Partners, Mr. Ren worked as an analyst at Evercore in New York.

Mr. Ren holds a B.A. in Biology and a B.S. in Economics with a concentration in Finance, magna cum laude, from the University of Pennsylvania.

Samuel Rives is a vice president at Thomas H. Lee Partners. Prior to joining Thomas H. Lee Partners, Mr. Rives worked at Audax Private Equity in Boston, where he focused on investments in multiple industries including consumer, healthcare, and technology. At Audax, Mr. Rives developed investment theses, evaluated and executed new transactions, assisted management teams on growth initiatives, and helped manage sale and exit processes.

Mr. Rives holds a B.A. in Economics, summa cum laude, from Middlebury College.

Kearney Shanahan is a Principal at Thomas H. Lee Partners.  Prior to joining Thomas H. Lee Partners, Mr. Shanahan worked at Solamere Capital where he sourced, evaluated and executed transactions and was an active portfolio company board member. While at Solamere, he focused on healthcare, business, financial and government service and tech-enabled service businesses. Prior to Solamere Capital, he worked as an Associate at Fisher Lynch Capital and a Senior Associate at Cambridge Associates.

Mr. Shanahan holds a B.A. in Biology from Colby College and an M.B.A. from the Kellogg School of Management at Northwestern University.

Angela Shen is an associate at Thomas H. Lee Partners.  Prior to joining Thomas H. Lee Partners, Ms. Shen worked as an analyst in the Mergers and Acquisitions Group at Evercore in New York.

Ms. Shen holds a B.S. in Commerce & B.A. in Economics from the McIntire School of Commerce from the University of Virginia.

Ms. Shen is actively involved with Boston Cares.

Matthew Siatczynski is an associate at Thomas H. Lee Partners. Prior to joining Thomas H. Lee Partners, Mr. Siatczynski worked as an analyst in the Technology M&A Group at Lazard Freres & Co. in Boston.

Mr. Siatczynski holds a B.B.A. in Finance and Economics from the Mendoza College of Business at the University of Notre Dame.

Ravi Sinha is an associate at Thomas H. Lee Partners. Prior to joining Thomas H. Lee Partners, Mr. Sinha worked as an analyst in the Financial Institutions Group at J.P. Morgan Chase & Co. in New York.

Mr. Sinha holds a B.A. in Mathematics and Economics, cum laude, from Columbia University.

Mr. Sinha is actively involved with MassRobotics, Minds Matter Boston, and serves on the Board of the Columbia Young Alumni Association.

Tabish Valliani is an associate at Thomas H. Lee Partners.  Prior to joining Thomas H. Lee Partners, Mr. Valliani worked as an analyst in the Telecommunications M&A Group at Evercore in New York.

Mr. Valliani holds a B.S. in Business Administration with concentrations in Finance & Accounting, with honors, from the Tepper School of Business at Carnegie Mellon University.

Ben Ye is a vice president at Thomas H. Lee Partners. Prior to joining Thomas H. Lee Partners, Mr. Ye worked as a vice president focused on technology investing at SoftBank in San Francisco. Previously, Mr. Ye worked in technology private equity and growth equity at Apax Partners in New York.  Mr. Ye started his career at Barclays where he was a derivatives trader and also worked in investment banking.

Mr. Ye holds a B.S.E. in financial engineering and operations research from Columbia University.

Jason Corsello is an executive advisor to Thomas H. Lee Partners.  He brings over 15 years of experience in enterprise software, market research and management consulting to the firm.  In addition to his role at Thomas H. Lee Partners, Mr. Corsello is also the Founder and General Partner for Acadian Ventures, an early stage venture fund.

Prior to joining Thomas H. Lee Partners, Mr. Corsello was Senior Vice President of Strategy and Corporate Development for Cornerstone On Demand [NASDAQ: CSOD], where he was responsible for driving innovation, go-to-market strategies and new corporate initiatives including guiding M&A, leading the company’s corporate venture investments and accelerator program and overseeing new product initiatives including platform, content, analytics and mobile.  Previously, Mr. Corsello served as senior vice president at the HR consulting firm Knowledge Infusion (now Appirio). Prior to his role with Knowledge Infusion, Mr. Corsello was a research director at Yankee Group, leading the company’s human capital management and talent management advisory and consulting services.

Mr. Corsello holds a B.B.A. in Business Administration from the University of San Diego.

Ron Kyslinger is an executive advisor to Thomas H. Lee Partners.  He brings nearly thirty years of operations, manufacturing and engineering experience with a consistent record of success in all sectors of engineering and operations.  Mr. Kyslinger has provided leadership in a number of different roles including SVP and VP of engineering and operations as well as executive director, general manager of manufacturing, and global director of strategy and has demonstrated success in leading organizations to increased profitability while maintaining focus on customer expectations and quality.  Mr. Kyslinger has experience as both the customer and the supplier of automated equipment and processes and can provide insight from both perspectives.  Prior to joining Thomas H. Lee Partners, Mr. Kyslinger was an independent industry consultant.  Prior to that, he was the SVP of fulfillment engineering and global officer of Walmart, where he implemented innovative strategies to improve efficiency in their e-commerce network and increased automation at the fulfillment centers while designing the fulfillment centers of the future for sortable, non-sortable and grocery.  Mr. Kyslinger was formerly the executive director of worldwide operations engineering, design and innovation at Amazon and vice president of operations and automation at C&S Wholesale Grocers.

Mr. Kyslinger holds a B.S. in Electrical Engineering from the University of Pittsburgh and an M.S. in Business Administration from Central Michigan University.

Dr. Patt is an executive advisor to Thomas H. Lee Partners.  He brings over fifteen years of operating and technology growth strategy experience with a proven track record of synthesizing strategic insights with results-focused execution.  Dr. Patt has provided leadership in a number of different roles including CEO, Chief Strategist, Co-Founder and Deputy Director.

In addition to his role at Thomas H. Lee Partners, Dr. Patt supports business and technology strategy for STR, an artificial intelligence and cyber security company.  Prior to that role, he was the Co-Founder and CEO of Vecna Robotics, a VC-backed workflow orchestration and material movement robotics company based in Waltham, Massachusetts.  Dr. Patt also served as Deputy Director for the Defense Advanced Research Projects Agency’s (DARPA) Strategic Technology Office (STO), managing nearly $500 million in annual technology investments in networking, communications, and artificial intelligence.  He oversaw and enabled the maturation of technology from conceptual and seed stage levels all the way through successful operational, financial, technology, and commercial transitions. He joined DARPA in 2012 as a program manager in the Tactical Technology Office (TTO), working primarily in autonomy and robotics.  Dr. Patt previously worked at Karem Aircraft and The Boeing Company in automated flight control, machine perception and unmanned vehicles.

Dr. Patt holds a PhD in Aerospace Engineering from the Horace H. Rackham Graduate School at the University of Michigan, an M.S. in Systems Engineering and a B.S. from the University of Michigan.