Our Company

Our History

R.T. McCalpin & Associates, LLC (RTM CPA) is a full-service Certified Public Accounting (CPA) firm located in Laurel, Maryland. Founded in December 2009, we specialize in offering cutting-edge solutions that deliver lasting value for our clients through professional audit and accounting guidance and expertise. We offer a full range of services including accounting, audit, bookkeeping, peer reviews, tax preparation and management advisory services with personalized individual attention to each of our clients.

Our founder and principal, Diana McCalpin, CPA, CGFM is a practicing Certified Public Accountant (CPA) with over twenty years’ experience in both public and private accounting industries. Diana has assembled a team of experienced and professional accountants, tax and audit experts, who offer tailor-made solutions to our clients to assist them in building professional business relationships. Our team shares insightful information with our clients on a regular basis to keep them abreast of emerging accounting and tax issues and practices. We also maintain a comprehensive and extensive continuing professional education program for our staff to ensure our staff always deliver top-notch quality services to our clients.

At R.T. McCalpin & Associates, we are a client-service oriented company that values and understand the importance of meeting the expectations of our clients. Our primary goal is to provide quality, professional, and personalized services to all our clients at affordable rates. We are proud of our enduring reputation of delivering high-level accounting expertise and consulting to our clients.

Our CPA firm is licensed to provide professional accounting services in the states of Maryland, Virginia, the District of Columbia. Our audit and accounting services are offered to client throughout the Washington Metropolitan Area and beyond. On July 23, 2012, our firm gained certification as an 8(a) woman-owned minority business by the U.S. Small Business Administration (SBA) under the primary North American Industry Classification System (NAICS) Code 541211. We are also on the list of Professional Services Schedule (PSS) under the GSA Contract Number GS-23F-024BA, a testament to our commitment to quality.

We are here to help you boost your business growth and profitability by offering unparalleled service and excellence beyond traditional accounting. Contact us today for your free consultation!

Diana McCalpin Principal

Meet Our Principal

Diana McCalpin, CPA, CGFM

Diana McCalpin has over 20-year experience in public and private accounting and more than 15-year experience as a practicing Certified Public Accountant (CPA) bringing valuable, support and solutions to small businesses in several industries including government contracting, professional services, non-profit, and technology to name a few. Diana began her career in private accounting at a large Government contracting technology firm in Maryland. After spending four years in the accounting department in that private firm, she decided she wanted to understand the whole aspect off accounting and so she joined a local Public accounting firm, Penan & Scott, PC as a staff accountant. After just one year she was promoted to Senior accountant and after spending several years at this firm and learning the foundation of audit and accounting and tax preparation, she joined Aronson & Company as a Senior Auditor in the Government Contracting group. Diana was responsible for preparation of the audit and financial statements and training and supervising staff accountants on her engagements. A few years later Diana joined the Real Estate and Non-Profit group at the Reznick Group, now CohnReznick. Her responsibilities included leading and supervising several audit engagements for the firm’s Real Estate and Non-Profit clients. On December 19, 2009, Diana left Reznick Group and formed R.T. McCalpin & Associates, LLC (RTM CPA), a CPA firm based in Laurel Maryland that serves small and mid-sized businesses.

Diana graduated from the University of Maryland, University College with a Bachelor of Science degree in Accounting and a Master of Science Degree in Accounting and Finance.

Why Choose Us?

At RTM CPA, we treat each client as if they are our only client. Unlike other firms, we want our clients to hold us accountable for what we promise. We promise to always be responsive to your needs and to always strive to deliver on time. We are committed to providing value added professional services and to delivering exceptional client services. The services we provide will allow you to focus on building and growing your business, while we take care of all your accounting and financial needs.

What Sets Us Apart from the Competition?

Accurate, Quality Service

Reliable, On-Time Service

Trusted Client Relationships

Professional, Affordable Services

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