Prior to founding G&M Realty Ventures, LLC, Mr. Mancini held senior positions with large real estate development companies including Campeau Corporation California, Perini Land & Development Company, and Bramalea Pacific. The scope of his assignments with these companies included the development of two successful mixed-use projects: Rincon Center, San Francisco; and City Center, Oakland; and Executive Park, San Francisco.

Following the successful completion of those projects, Mr. Mancini formed his own firm in 1990, and began creating a multi-disciplinary advisory services practice, which leveraged his development expertise to solve complicated real estate issues.  In particular, Mr. Mancini was one of the three major authors of the Presidio of San Francisco Implementation Strategy.  He and his team of professionals were hired to implement the Plan by the National Park Service.  Mr. Mancini has also been an Advisor to the San Francisco Giants, BART, and numerous other clients.  

During this period of providing Advisory Services, Mr. Mancini was also active in the acquisition and development of commercial property.  In this capacity, Mr. Mancini and G&M Realty Ventures, LLC were chosen to develop the three office buildings (740,000 sq, ft,) that made up the 16-acre Menlo Gateway development in Menlo Park, California.  The all-in cost was $550 million.  The buildings were successfully leased to Facebook.  

Mr. Mancini is a Wharton School MBA graduate. He also served as a Marine Corps infantry officer in both infantry and special operations units.

Mr. Mancini has transitioned into the coaching of executives, and is partnering with Vistage, the oldest executive coaching organization in the United States. He also continues to manage his portfolio of investment property.   

https://www.linkedin.com/in/jay-mancini-7a721112/