Stone Mattheis Xenopoulos & Brew, PC
Washington, DC
- UEI
- GHCMCZUJKG14
- CAGE
- 7S4W4
- Primary NAICS
- 541110 Offices of Lawyers
- SAM.gov registration
- Active through
Company facts
- FY2025 rankings
- Self-certified in SAM.gov
- Entity structure
- Corporate Entity (Not Tax Exempt)
- SAM.gov registration date
- Physical address
- 1025 Thomas Jefferson St NW e 3400, Washington, DC 20007, USA
- Website
- smxblaw.com
- Employees
- 11-50
- Estimated annual revenue
- $1M-$10M
- Industry
-
- Consumer Discretionary
- Diversified Consumer Services
- Specialized Consumer Services
- Legal Services
- SIC code
- 81 Legal Services
- Profiles
Registration and certifications come from SAM.gov and the SBA; company details from public web sources. Updated .
Contract obligations by fiscal year
| Fiscal year | Obligated |
|---|---|
| FY2027 To date | $0 |
| FY2026 | -$9,619 |
| FY2025 | $245,000 |
| FY2024 | -$108,812 |
| FY2023 | $600,000 |
Contract awards
Latest 5 listed here. See the rest on GovTribe.
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About the company
Stone Mattheis Xenopoulos & Brew, PC is a for-profit legal services firm based in Washington, DC that provides expert utility regulatory support and compliance advisory services to the General Services Administration as a prime contractor on definitive contracts, with no subcontractor footprint and no set-aside designations across its federal award history.
The firm operates exclusively as a prime (100% of recent awards) with zero sub engagement. Its customer base is entirely concentrated within the General Services Administration's Public Buildings Service — three distinct PSC 1099 (Support, Professional: Legal) awards split between GSA's Central Office Energy Division, Region 1, and the broader Public Buildings Service structure. All six awards in the source data relate to regulatory expert services and utility regulatory program support, with no work outside GSA. The most recent award, dated September 30, 2026, is a $780,951 definitive contract for expert utility regulatory support services extending through September 29, 2029. Prior awards include a $270,200 FY25 utility regulatory program funding increase (awarded September 30, 2025, completing September 29, 2026) and a $312,526 contract modification for non-severable regulatory expert services originally awarded September 30, 2023 and completing September 29, 2025.
Activity has been sparse and episodic — one award each in 2018, 2020, 2023, 2025, and 2026, with a combined potential value of $3.4 million across the full award history and $2.7 million obligated to date (80% of potential value). No recompete cliff is signaled in the immediate pipeline beyond the September 2025 and September 2026 expirations already identified in the award summaries.
Service Contract Inventory data reflects minimal federal services-contract activity: $721 thousand in invoiced revenue across four SCI records (prime only) spanning FY2022 through FY2024, with delivery averaging 0.2 to 0.4 FTEs per fiscal year. Government-paid hourly rates on SCI-reportable contracts ran a narrow range — median around $388/hr, with 10th-percentile rates at $382/hr and 90th-percentile rates at $408/hr — consistent with senior regulatory counsel billing on fixed-price utility advisory contracts. The vendor delivers all work as internal staff with no named subcontractors.
Quick answers
Is Stone Mattheis Xenopoulos & Brew, PC registered in SAM.gov?
Yes. Stone Mattheis Xenopoulos & Brew, PC's SAM.gov registration is active through March 25, 2027.
What is Stone Mattheis Xenopoulos & Brew, PC's CAGE code?
Stone Mattheis Xenopoulos & Brew, PC's CAGE code is 7S4W4, and its Unique Entity ID (UEI) is GHCMCZUJKG14.
How much has Stone Mattheis Xenopoulos & Brew, PC received in federal contracts?
Federal contracts obligated $245,000 to Stone Mattheis Xenopoulos & Brew, PC in fiscal year 2025 and $726,569 in fiscal years 2023 through 2027.
How does Stone Mattheis Xenopoulos & Brew, PC rank among federal contractors?
Stone Mattheis Xenopoulos & Brew, PC ranked #48 in NAICS 54111 in FY2025.
What is Stone Mattheis Xenopoulos & Brew, PC's most recent federal award?
Stone Mattheis Xenopoulos & Brew, PC's most recent federal contract award is Expert utility regulatory support services to assist the general services administration, public buildings service… (47PA0826C0002), from Public Buildings Service, on September 30, 2026.
On GovTribe
See Stone Mattheis Xenopoulos & Brew, PC's full federal record
- Federal contract awards
- Funding analysis by agency, NAICS and set-aside
- Similar vendors