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Meet our Team

About Our Firm

For 70 years, Garbelman Winslow CPAs has been providing quality, personalized financial guidance to local individuals and businesses. Our expertise ranges from basic tax management and accounting services to more in-depth services such as audits, financial statements, and financial planning.

Garbelman Winslow CPAs is one of the leading firms in and throughout the area. By combining our expertise, experience and the team mentality of our staff, we assure that every client receives the close analysis and attention they deserve. Our dedication to high standards, hiring of seasoned tax professionals, and work ethic is the reason our client base returns year after year.

Our Mission

Our mission is to help clients maintain financial viability in the present, while taking a proactive approach to achieve future goals. This requires open communication to reach an understanding of our clients' needs through research and sound analysis. Garbelman Winslow CPAs is dedicated to meeting these goals with high standards of excellence and professionalism. We have been a staple of the area's business community for years, and pride ourselves on the level of esteem we have earned.

Our dedication to hard work has earned the respect of the business and financial community in and around the area. We believe this to be a direct derivative of our talent and responsiveness to our client base. Whether you are a current or prospective client, rest assured that individuals and businesses who choose Garbelman Winslow CPAs receive competent and timely advice.

Our Team

John J. Benish, Jr., CPA, CGMA (301) 599-9666 ext 22

Academic Credentials:

  • University of Maryland, College Park, Bachelor of Science, December 1985
  • Certified Public Accountant, February 1987
  • Chartered Global Management Accountant, November 2014

History with Firm:

  • Employed July 1985
  • Partner July 1, 1994
  • Managing Partner, July 2011

Professional Societies & Affiliations:

  • American Institute of Certified Public Accountants
  • Association of Builders and Contractors - associate member
  • Association of Practicing Certified Public Accountants
  • Calvert County Chamber of Commerce
  • Maryland Association of Certified Public Accountants Southern Maryland Chapter - President (1997-1998)
  • Prince George's County Chamber of Commerce

Community Involvement:

  • Rotary Club of Upper Marlboro (1989-present), President (1996-1997), (2008-2009)
  • Vesta, Inc.-Board of Directors (1994-1999)
  • Melwood Horticultural Training Center, Inc. - Board of Directors (1998-2007)
  • University of Maryland Terrapin Club
  • University of Maryland Alumni Association
  • Southern Prince George's Rotary Foundation, Inc. - Treasurer (1998-present)
  • Friends of Calvert Hospice, Inc. Director (2000-2006)
  • Boy Scouts of America Troop 429 - Committee Member (2001-2010)


  • Small Business consulting including construction contractors, medical practices, attorneys, retirement plans, manufactures, real estate
  • Business and Individual Income Taxes
  • Business and Individual Tax, Financial Planning, Estate Planning

Samantha A. Bowling, CPA, CGMA (301) 599-9666 ext 23

Academic Credentials:

  • Certified Public Accountant, February, 1998 (Licensed in Maryland, D.C. and Arizona)
  • Chartered Global Management Accountant, November 2014
  • Salisbury State University, Salisbury, Maryland - Bachelor of Science, Magna Cum Laude, Accounting, June, 1993
  • College of Southern Maryland, La Plata, Maryland, Associates of Arts, Business Administration, June,1991

History with Firm:

  • Employed June, 1993
  • Partner July, 2005


  • AICPA's 2019 Most Powerful Women in Accounting
  • 2018 Innovative Practitioner Award
  • Daily Records Maryland’s Top 100 Women of 2016
  • Daily Records Maryland’s Top 100 Women of 2018
  • National Dean's List 1992
  • Who's Who Among Students in Junior Colleges, 1991
  • Dean's Cup Recipient, 1991
  • Wall Street Journal Award for Academic Excellence, 1991
  • Scholarship Recipient: Transfer Merit Scholarship from Salisbury State University 1991, Achievement Award 1991, Alumni Association Scholarship 1991 and 1990, Institutional Scholarship 1989, and the Mary Matula Scholarship 1989
  • Dean's List 1989-1993
  • Reward for Academic Performance 1987-1989
  • Recognized in The Cambridge Who's Who of Executives and Professionals 2006 & 2007 Edition

Professional Societies & Affiliations:

  • American Institute of Certified Public Accountants
  • Association of Practicing Certified Public Accountants
  • Delta Mu Delta Honor Society
  • Maryland Association of Certified Public Accountants Southern Maryland Chapter - President and President-Elect (2003,2004-2005,2009,2010-2012), Secretary (2002,2006,2008), Board Member (1999-2011)
  • Phi Beta Phi Honor Society
  • Salisbury State University Alumni Association
  • Life-time Member of Cambridge Who's Who
  • Maryland Association of Certified Public Accountants Board of Directors April, 2011 - May, 2013
  • AICPA Council Member May, 2013 - May, 2019
  • MACPA’s Task Force on Equality, Diversity and Inclusion Chairman June, 2014
  • MACPA Nominations Committee, July 2014
  • MACPA Secretary/Treasurer July 2016 – 2017
  • MACPA Vice Chair July 2017 – 2018
  • MACPA Chair July 2018 – 2019
  • Branch Banking and Trust Advisory Board, January 2017

Community Involvement:

  • Mentor
  • Team Captain - Avon Walk for Breast Cancer (2005-2011)
  • Member - St. Mary's Catholic Church, Bryantown (1993-Present)
  • La Plata High School Reunion Committee
  • Student Tutor
  • Hughesville Hurricanes Youth Sports
  • Matthew Adams Heart Foundation


  • Auditing, Accounting and Consulting: Construction Companies and Related Fields, Distributors/Retailers, Attorneys, Non-Profit Organizations and Pension Plans
  • Tax: Business, Individual and Unrelated Business Income
  • Financial Software: QuickBooks and Peachtree

John E. Stringer, CPA 301-599-9666 ext. 11

Academic Credentials:

  • Benjamin Franklin University, Washington, DC, Bachelor of Commercial Science, June 1969
  • Certified Public Accountant, Maryland, 1972

Professional History:

  • Partner, Quinn, Aronhalt & Company, CPA’S 1973-1975
  • Partner, Aronhalt, Stringer & Company, CPA’S 1976-2014
  • Partner, Garbelman Winslow CPA November 2014

Professional Societies & Affiliations:

  • American Institute of Certified Public Accountants
  • Maryland Association of Certified Public Accountants
  • Maryland Society of Accounting & Tax Professionals

Community Involvement:

  • Rotary Club of Charles County ( LaPlata) – Past President 1991-1992
  • Charles County Rotary Foundation – Volunteering Services (prior officer/director)
  • Down Syndrome Association of Southern Maryland – Volunteering Services (prior officer/director)
  • Literacy Worldwide Foundation, Inc. – Volunteering services ( prior director)


  • Tax: Business, Individual, Estates & Trusts
  • Estate Planning
  • Estate & Trust Administration
  • Small Business Consulting – Professional Services and Contractors


  • Lisa Burdick, CPA - Accounting Manager
  • Barrett Young, III, CPA - Accounting Manager
  • Lori Walker - Staff Accountant
  • Michelle Truscott - Staff Accountant
  • Tom Hickey - Staff Accountant, Enrolled Agent
  • John M. Benish - Staff Accountant
  • Marietou Yao - Staff Accountant
  • Emmanuel Amaechi - Staff Accountant
  • Samantha Cronk - Accounting Intern


  • Kelly Edelen - Office Manager
  • Shannon Broderick - Admin Support
  • Jessica Reid - Admin Support



  • Dan Jenkins - Network Administrator
  • Briana Yotko - Admin/Payroll Support



  • Garbelman, Winslow, Benish, Deck, Grannell, Ewaski & Bowling, CPA's
  • Melwood Professional Center
  • 9540 Marlboro Pike
  • Upper Marlboro, MD 20772
  • Telephone: (301) 599-9666
  • Fax: (301) 599-1067