Mark Witschorik is a Managing Director and Head of Portfolio Management, North America at Jamestown, as well as a member of the firm’s Executive Committee and Investment Committee.
On behalf of Jamestown’s funds and separate accounts, Mr. Witschorik leads the investment committee portfolio review, business planning, and strategic direction of Jamestown’s more than $14 billion of investments in the United States as of June 30, 2025.
He also oversees Jamestown’s Portfolio Management division that is comprised of its operating teams, including Ancillary Revenue, Asset Management, Creative and Marketing, Dispositions, Office and Retail Leasing, New Business, Portfolio Analytics, Portfolio Operations, and Property Management.
At Jamestown, Mr. Witschorik led the consolidation of operating teams across eight departments as well as the integration of the North American Properties Atlanta team and portfolio into the Portfolio Management Division of the platform. He has also overseen several million square feet of leasing volume, including the execution of key transactions such as American Eagle (330,000 square feet), Jones Day (225,000 square feet), and Stand Together (185,000 square feet).
Mr. Witschorik also directs the deployment of Services and Separate Accounts strategies and teams, including the Jamestown for Google real estate partnership. Under his leadership, the Google mandate has grown to include an asset management and strategic finance vertical, and the services platform has onboarded an additional three accounts across the United States.
Throughout his career, he has executed lease-up, development, and repositioning campaigns throughout the United States in multiple asset classes, including the design, entitlement, and pre-lease of 80 M Street, the first mass timber construction in Washington, D.C. Mr. Witschorik also led the successful 832K square feet lease extension and reconstruction of the Westinghouse Electric headquarters campus in Cranberry Woods, PA, while navigating a tenant bankruptcy process.
In total, Mr. Witschorik has participated in the execution of more than $5 billion of successful portfolio transaction strategies across the United States, including value-add acquisitions and repositioning, ground-up development, non-core dispositions, and strategic joint ventures with Allianz and Blackstone. He also supported executive leadership in mergers and acquisitions in a prior role, leading to a $100 million acquisition of a vertically integrated real estate fund manager.
Prior to joining Jamestown, he was a market leader at Columbia Property Trust in the Eastern Region and began his career at the J Street Companies and later Akridge, holding acquisitions, analytical, asset management, development, and related roles.
Mr. Witschorik is an active member of Georgetown and Ballston Business Improvement Districts in the Washington, D.C. region. He earned a Bachelor of Arts in Finance from the University of Notre Dame.