Mark Tabor


Mark Tabor joined Custom Medical Services in March 1999. He guided the company’s growth by creating and establishing the policies and procedures necessary to maximize revenue for clients. Mr. Tabor is originally from Pittsburgh. After attending law school, he worked for the Certified Public Accounting firm Epstein, Tabor and Schorr C.P.A.s from 1975 until 1979 when he re-located to Boca Raton, Florida to be Vice President of Gilbert’s Fine Furniture, a family business founded in 1929. Mr. Tabor was affiliated with Gilbert’s until 1996. He has overseen the growth and technological changes of Custom Medical Services.

Greg Tabor

Director of Operations

Greg Tabor began working at Custom Medical Services, Inc. part-time in 2004 while completing his graduate degree. He received both his Bachelor of Business Administration in Finance in 2003 and a Masters of Business Administration in Finance in 2005 from The University of Miami. Prior to his employment at CMS, Greg was Assistant Director of Operations at Town and Country Industries, and worked at Morgan/Stanley and Tyco, Inc.  Greg began working full time at CMS in 2006. He has been responsible for overseeing all of the technological advances at CMS for the past 10 years. His ability to research the best, most efficient and effective way to accomplish a task has proven to be a beneficial resource to CMS.

Martha Barrientos

Director of Administration

Martha Barrientos began working part-time at Custom Medical Services, Inc in 1998 while completing her college education. She graduated in 2002 with a Bachelors Degree in Finance from Florida Atlantic University. Martha had individual practice responsibilities and was later elevated to the position of Team Leader. She was responsible for CMS’s highest volume accounts until being promoted to Director of Administration in 2006. Martha has over 17 years of experience in the Medical Billing field and is an integral part of the management team.