News release

RSM Joins Forces with Washington, D.C.-Based Tate & Tryon

Dec 02, 2019
Dec 02, 2019
0 min. read

Andreia DeVries, National Public Relations Manager,, 212.520.1266
for media use only 

RSM US LLP (“RSM”) – the nation’s leading provider of audit, tax and consulting services focused on the middle market – announced today that the leaders and staff of Tate & Tryon, P.C., a Washington, D.C.-based accounting firm focused on serving nonprofit organizations with audit, tax, accounting outsourcing and advisory services, and its wholly owned subsidiary, T3 Information Systems, LLC, are joining RSM. The firms have signed a definitive agreement for RSM to acquire substantially all the assets of Tate & Tryon and its subsidiary, and the transaction is expected to close on Jan. 1, 2020, subject to certain terms and conditions.

The transaction deepens RSM’s focus on serving the nonprofit industry—particularly professional, trade and membership associations and charitable organizations—and expands the firm’s presence in the Washington, D.C. metro area, adding 11 partners, two principals and nearly 140 professionals. RSM’s presence currently includes six offices in the Mid-Atlantic region—with three offices in the immediate D.C. metro area—that include 58 partners and principals and 586 employees.

The transaction also enhances RSM’s growing technology consulting practice with the addition of Tate & Tryon’s T3 team, which specializes in Microsoft Dynamics (GP, SL and 365BC), Sage Intacct, corporate performance management solutions, and custom application development. RSM is the largest Microsoft Dynamics reseller in the U.S., and the addition of the T3 team expands that lead. In addition, Tate & Tryon’s outsourced accounting services practice will significantly expand RSM’s practice, adding an established outsourced accounting services team in Washington, D.C.

Tate & Tryon Co-Founder and Managing Partner Charlie Tate, Co-Founder and Senior Partner Mike Tryon, and the firm’s other partners and team members will transition to RSM US LLP upon closing. Together, the firms will offer RSM’s full line of services and will further solidify RSM’s position as the leading advisor to the middle market, including serving roughly half of the organizations on the list of the largest associations in the Greater Washington, D.C. metro area, as compiled by the Washington Business Journal.


RSM’s purpose is to deliver the power of being understood to our clients, colleagues and communities through world-class audit, tax and consulting services focused on middle market businesses. The clients we serve are the engine of global commerce and economic growth, and we are focused on developing leading professionals and services to meet their evolving needs in today’s ever-changing business environment.

RSM US LLP is the U.S. member of RSM International, a global network of independent audit, tax and consulting firms with 51,000 people across 123 countries. For more information, visit, like us on Facebook, follow us on Twitter and/or connect with us on LinkedIn.