Connect With Industry Leaders

The Penrose Group leadership team includes some of the industry’s most seasoned and respected professionals. With an eye for innovation and a commitment to detail, our team is the driving force behind the success of our properties. Partnering with The Penrose Group means partnering with the best.

  • Mark W. Gregg Mark W. Gregg
  • Olav B. Kollevoll, Jr. Olav B. Kollevoll, Jr.
  • Ron Testa Ron Testa
  • Michael Gregg Michael Gregg Michael R. Gregg
  • Andrew Gregg Andrew Gregg Andrew W. Gregg
  • Rebecca Zhang
    Senior Accountant

Mark W. Gregg, Founder
Managing Partner & President

Mr. Gregg has over 30 years of experience in various aspects of commercial, residential, hospitality and retail real estate. Mr. Gregg founded The Penrose Group in 1990 and its team of professionals has become one of the leading diversified real estate firms in the Washington, DC area, providing asset management, development and financial services to the real estate industry. Mr. Gregg is a member of many professional and charitable organizations. He earned his BA from the University of St. Thomas, St. Paul, Minnesota.

Olav B. Kollevoll, Jr., Esquire
General Counsel

Mr. Kollevoll is General Counsel of The Penrose Group. Prior to joining Penrose, he was Partner of Miles & Stockbridge, one of the leading law firms in the Washington, DC, and Baltimore area. Over 30 years, he has served as legal counsel, specializing in all types of commercial real estate transactions. Mr. Kollevoll earned his Bachelor’s degree from Williams College and his law degree from American University.

Ron Testa, CFO
Chief Financial Officer

Mr. Testa is the Chief Financial Officer of The Penrose Group.  He joined Penrose in 1996 and has over 30 years of financial and accounting experience in residential and commercial development.  He holds a BS in Accounting from Seton Hall University.

Michael R. Gregg, LEED AP BD +C

Michael is a Partner of The Penrose Group. He joined Penrose in 2011 from Turner Construction and earned his Bachelor’s degree from Susquehanna University.  Michael is responsible for acquisitions at Penrose along with daily management of project design, permitting and construction administration activities for all of The Penrose Group’s development projects.  Projects of note include Park Crest community in Tysons Corner, VA along with Latitude, Pike 3400, and 672 Flats Apartments in Arlington, VA.  Michael is a member of several professional organizations including , The DC Real Estate Group, ULI and is a LEED AP BD+C.

Andrew W. Gregg, Esquire

Mr. Gregg is a Partner of The Penrose Group. He joined Penrose in 2012. Mr. Gregg earned his Bachelor’s degree from St. Mary’s College of Maryland and his law degree from the University of St. Thomas. Mr. Gregg worked on the negotiation and closing of multiple major mixed-use projects for Penrose. Andrew is a member of The DC Real Estate Group, The Virginia State Bar, Young Lawyers Conference of the Virginia State Bar and The Virginia Bar Association.

Rebecca Zhang, Senior Accountant
Senior Accountant

Rebecca joined The Penrose Group in 2019 as a Senior Accountant. She earned her master’s degree in accounting from University of Delaware and has over three years in financial accounting and reporting.