NAI Mertz HQ
21 Roland Avenue
Mt. Laurel, New Jersey 08054 United States
t1 (856) 335-1080 f1 (856) 234-4957
Executive Vice President - Managing Director

Specialties:  Investment, Office

Background & Experience
John Adderly has an extensive history of acquiring, financing, selling, leasing, and managing premier office and flex properties portfolios with some of the nation’s leading real estate investment firms. John has overseen the leasing, acquisition, disposition and property management for numerous top-tier investments and has a strong track record of enhancing portfolio performance and driving corporate growth.

John’s extensive experience in leasing, acquisitions and dispositions will allow him to deliver unique insights and perspectives to clients whether they be a Landlord, Tenant, Buyer, or Seller.

Most recently, John served as Vice President of Mack Cali Realty Corporation with full responsibility for leasing and property management in the Mid-Atlantic Region. He had direct oversight of 74 office and office/flex properties totaling 5.5 million square feet and an additional 1.5 million square feet of development sites. Under John’s direction, the portfolio outperformed the market both in occupancy and rental rates in all of its represented markets.

Prior to that, John held Senior Vice President positions with both The Arden Group and The Rubinstein Company. With both firms, he held full responsibility for acquisition, disposition, financing and joint venture structuring for national portfolios.

Earlier in his career, John served as Senior Vice President for Brandywine Realty Trust. At the time he joined Brandywine, the firm had 4 assets and a market capitalization of $10 million. At the end of his tenure with the firm, Brandywine had over 240 assets and a market capitalization of over $3 billion establishing it as a dominant company in multiple markets.
Temple University, B.S. Accounting
Professional Associations & Designations
- Licensed Real Estate Salesperson, NJ, PA & FL
- NAIOP - Past Chairman, Capital Markets Forum & Leasing and Marketing Forum; Past Board Member, Greater Philadelphia & New Jersey Chapters
- Businesses Committed to South Jersey - Past Treasurer & Board Member
- Jefferson Bank, NJ - Past Advisory Board Member
- Philadelphia Business Journal - Winner, Best Suburban Office Lease
- Philadelphia Business Journal - Winner, Best Suburban Office Sale