Virgil Prewitt


Virgil Prewitt conducts technology and operations research and analysis to support Circumference Group investing decisions, bringing to bear over 35 years of IT experience that covers the entire lifecycle of software development, deployment, monitoring, and support. Over his career, Virgil has won numerous industry awards for his innovative solutions that were on the cutting edge of the latest technology.

Virgil was previously the Principal Architect at Limelight Networks, where he was responsible for the video, storage, and function-as-a-service development organizations. Before Limelight, Virgil served as an Enterprise Cloud Architect for Oracle Corporation where he guided Fortune 500 companies on their journey to the cloud utilizing the Oracle Cloud Infrastructure. Virgil also served as CTO of Trifecta Technologies where he architected enterprise solutions utilizing the Salesforce solution.

Karsten Lampka


As Partner of Private Equity Investments, Karsten Lampka leads Circumference Group’s private investing practice.

Karsten brings to Circumference Group more than 25 years of investment banking and private equity experience. Over his distinguished career, Karsten has executed over $25 billion in M&A and private and public capital raising across the healthcare, technology, telecom, media and general industrial sectors.

Karsten most recently served as CEO of Tri-Private Capital, a family office based in Nashville. Prior to Tri-Private Capital, he spent over a decade at Avondale Partners, a boutique investment bank focused on the healthcare and technology industries, as a Managing Director and at various times served as Co-Head of their Investment Banking group and was on the firm’s Management Committee.

Before Avondale, Karsten held investment banking positions at Thomas Weisel Partners, UBS, Dillon Read and Stephens Inc. He holds an MBA from The Wharton School and a BBA from the University of Texas at Austin.

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