DeLeon & Stang CPA's
Mary R. Gray
100 Lakeforest Blvd., Suite 650
Gaithersburg, MD 20877
Phone: 301-948-9825
Fax: 301-948-3220
Member Since May 2019



We’re committed to… improving the lives of our staff, clients, and community with innovation, trust and integrity.

DeLeon & Stang, Certified Public Accountants and Advisors is not your average accounting firm. Sure… we provide the highest quality accounting, tax, audit, and advisory services to both businesses and individuals, but we don’t stop there. 

Our footprint in the Mid-Atlantic region spans more than 35 years, and our clients appreciate our friendly, no-nonsense approach. Moreover, as an anticipatory organization we go beyond traditional services by providing clients with a future-forward look at their financial situation. 

Team Network Member Mary joined DeLeon & Stang in 2014 and currently serves as a Senior Accountant.  Having earned a QuickBooks Pro-Advisor Certification (2011-2013), she has done a lot of work with small, family run businesses in various industries.

Self-described as honest, she is considered cooperative by her peers.  Mary holds herself to a higher standard when it comes to customer service, with regard to both internal and external communications.  She attributes her success to her desire to learn new things and help others.  

A favorite quote of hers is from a poem called Desiderata by Max Ehrmann: “As far as possible without surrender be on good terms with all persons.”


It's All In Who You Know!    When you are in need of a product or service, it's more comforting when someone you know refers you to someone they know. As members of the Team Network, it is important that we use and refer good, honest companies to our friends and customers. We regularly use and recommend, with confidence, the services of our fellow Team members and therefore, you can too! "It's like having a friend in the business."    Please visit to learn more.