Our Team


Our principals – Timothy Goetz, Robert Geiger and Jack O’Donoghue – possess more than 90 years combined experience in commercial real estate services. Since its first year, GSA has been committed to delivering the highest level of service possible through teamwork and the utmost integrity and professionalism.

Timothy R. Goetz


Robert N. Geiger


Brokerage Team

Randall G. McCombs, SIOR

Executive Vice President

John M. Lisowski

Vice President | Industrial Brokerage & Leasing

Gary F. Roberson

Vice President | Brokerage & Leasing


Samuel T. McGill

Senior Vice President | Brokerage & Leasing

John S. Jackson

Senior Vice President | Retail Brokerage & Leasing

Evan Cicirello

Vice President


Scott Parry

Vice President






Support Staff

Diane McQuade

Director of Marketing Design

Nicole D. Montecupo

Director of Operations
Ashley Koltonski

Ashley Koltonski

Director of Communications

Leona Hodson

Administrative Assistant