Welcome to Greater Baden Medical Services

Opening Hours : Monday to Saturday - 8am to 9pm
  Contact : 301-888-2233

Executive Leadership Team

Sonja Bachus
Chief Executive Officer


Sonja Bachus has been Chief Executive Officer of Greater Baden Medical Services since April 2019.

Prior to Greater Baden, Ms. Bachus was Chief Operating Officer at HealthNet, Inc. overseeing the day-to-day operations of the state’s largest federally qualified health center. Sonja has more than 17 years of experience in health care operations management.

Sonja holds a bachelor’s degree in business administration from Washburn University and a master of jurisprudence in health law from Loyola Law School. Sonja has also earned the distinction of Fellow, Community Health Center Executive Management; completing the program in the fellowship’s inaugural cohort.


Dr. Samuel Croff
Interim Chief Medical Officer


Dr. Samuel Croff is a family practice physician who completed his training at Howard University College of Medicine. He completed his family practice residency training at St. Joseph Regional Medical Hospital Center. Dr. Croff is a member of the American Academy of Family Physicians and he specializes in family practice.

He has been a physician at Greater Baden since 2002.


Linda Thomas
Chief Financial Officer and Corporate Counsel


Linda Thomas is a strategic financial leader with patient-focused healthcare experience in financial, accounting, legal, financial operations and risk management.

Prior to joining Greater Baden in 2019, Linda served as the Director of Finance at Indiana University Health, Inc, the state’s largest healthcare system. In her leadership position, she was directly responsible for over $6B in assets. Linda holds a bachelor of science in finance and real estate and a juris doctorate degree from Indiana University.


Chris DeMarco
Chief Administrative Officer


Chris DeMarco is a leader with over 27 years of healthcare experience including 11 years of strategic consulting to FQHCs and 12 years in FQHC operations. Prior to assuming a role as Chief Administrative Officer, Chris served as the interim Chief Executive Officer at Greater Baden Medical Services. In his interim capacity, he led a turnaround effort highlighted by a reduction of cost and enhanced revenue within six months without any staff reduction.

Chris holds a bachelor of arts degree in religion from Bucknell University. He also received his masters and doctorate degrees from Syracuse University’s School of Citizenship and Public Affairs. In addition, Chris holds an MBA in Business of Medicine from John Hopkins University’s Carey School of Business.


Julie London Brewer
Chief Human Resources Officer


Julie London Brewer is a seasoned human resources professional with over 20 years of corporate experience. Prior to joining Greater Baden in 2019.

Julie holds a bachelors of science degree in communications and marketing from Spalding University. She also has completed industry executive management programs and holds numerous certifications.


Debra Apperson
Quality Director


Debra Apperson is a Nurse Practitioner who completed her nurse practitioner training at Bowie State University. She is certified by the American Nurses Credentialing Center (ANCC). Debra specializes in Family Practice.

Ms. Apperson has been a long-serving provider at Greater Baden since 1999.