Every fact below carries a source link and an as-of date. Informational only. Ownership statements are limited to primary announcements and filings.
- Headquarters
- Manassas, VirginiaSource: rdacivil.com/about-us · As of 2026-10-06
- Ownership type
- Private equity backed: Trilon history states Rinker Design Associates joined as a platform partner in February 2024; Trilon is backed by Alpine InvestorsSource: trilon.com · As of 2026-10-06
- Sponsor or parent
- Trilon.com history: Rinker Design Associates joined February 2024Source: trilon.com · As of 2026-10-06
- Employees
- 250+ employeesSource: rdacivil.com/about-us · As of 2026-10-06
- Website
- rdacivil.comSource: rdacivil.com/about-us · As of 2026-10-06
Legal name, DBA and former names
- Rinker Design Associates (RDA)Source: rdacivil.com/about-us · As of 2026-10-06
Identifiers (UEI, state registrations)
- SAM UEI M1RGXJHJRUF1 (as shown on the USAspending recipient record)Source: usaspending.gov/recipient/e89aeeca-a231-027f-94… · As of 2026-10-06
Offices
- 11 locations across Virginia (About page); earlier sentence also states 9 offices.Source: rdacivil.com/about-us · As of 2026-10-06
Ownership type
- Private equity backed: Trilon history states Rinker Design Associates joined as a platform partner in February 2024; Trilon is backed by Alpine Investors.Source: trilon.com · As of 2026-10-06
Sponsor, parent or transaction
- Trilon.com history: Rinker Design Associates joined February 2024.Source: trilon.com · As of 2026-10-06
Employee count or band
- 250+ employees.Source: rdacivil.com/about-us · As of 2026-10-06
Services and markets
- Virginia-based civil engineering.Source: rdacivil.com/about-us · As of 2026-10-06
Leaders
- Mark Gunn, PE, DBIA, Chief Operating Officer/Director of Engineering.Source: rdacivil.com/about-us · As of 2026-10-06
Deals
- February 2024: joined Trilon Group as platform partner.Source: trilon.com · As of 2026-10-06
Federal awards (contracts)
- USAspending recipient record RINKER DESIGN ASSOCIATES, LLC (Manassas, VA), contract award obligations: FY2021 $0, FY2022 $0, FY2023 $0, FY2024 $0, FY2025 $0 (award types A to D; obligations as published, including modifications and negative adjustments)Source: usaspending.gov/recipient/e89aeeca-a231-027f-94… · As of 2026-10-06
Rankings and awards
- Listed in the ENR 2026 Top 500 Design Firms.Source: enr.com/toplists/2026-top-500-design-fi… · As of 2026-10-05
News timeline
- Firm About page publishes Virginia office footprint and headcount.Source: rdacivil.com/about-us · As of 2026-10-06
Sources of record
Ownership tag: Private equity backed. Profiles are informational, compiled from public sources linked above. Firms may request corrections. A listing is not an endorsement.
