TCG-STL, LLC is a Washington, D.C. Metro-area based joint venture of The Chappelle Group, LLC (TCG) and Succeed to Lead (STL) created through the Small Business Administration approved All Small Mentor-Protégé agreement. This Mentor-Protégé agreement allows clients access to a Service-Disabled Veteran Owned Small Business and 8(a) Small Disadvantaged Business with the backing and experience of a large business.

We bring a “people first” culture that aids in retention of our qualified staff and an agile management framework that enables the quality and innovation required to successfully transform and modernize our efforts with the Government.

Discover how we can help you solve your healthcare, financial, technical, management and training challenges.


  • 541211 Offices of Certified Public Accountants
  • 541219 Other Accounting Services
  • 561320 Temporary Help Services
  • 541330 Engineering Services
  • 541511 Custom Computer Programming Services
  • 541512 Computer Systems Design Services
  • 541611 Administrative Management and General Management Consulting Services
  • 541618 Other Management Consulting Services
  • 518210 Data Processing

Contact Us

7500 Greenway Center Drive, Suite 900
Greenbelt, MD 20770
P: 301-220-3255