Federal contractor profile
CAPSTONE MECHANICAL & GENERAL CONTRACTOR LLC
UEI VMMHLJVJWG35CAGE 7ZKB8
Active
Small Business
Overview
- Legal name
- CAPSTONE MECHANICAL & GENERAL CONTRACTOR LLC
- Registered location
- SAN JUAN, PR, USA
- Primary NAICS
- 236220 — Commercial and Institutional Building Construction
- Latest award activity
- Feb 18, 2026
Read company summary
CAPSTONE MECHANICAL & GENERAL CONTRACTOR LLC is associated with UEI VMMHLJVJWG35 and CAGE 7ZKB8 in public federal records. AcornBids currently links 3 prime awards totaling $2.4M in obligations to this entity. Its largest recorded federal customer by obligations is Department of the Treasury. Its recorded federal awards include work classified as Other Management Consulting Services; Plumbing, Heating, and Air-Conditioning Contractors; Electrical Contractors and Other Wiring Installation Contractors. These categories describe the loaded award records, not a complete list of company capabilities. Its primary SAM.gov NAICS is 236220 (Commercial and Institutional Building Construction). Its public SAM.gov registration lists SAN JUAN, PR, USA.
At a glance
Lifetime prime obligations$2.4M
Prime awards3
Awards with future end dates1
Top-agency concentration80.9%
Prime contract obligations across loaded award records. Obligations are not revenue or contract ceilings. Summary updated Sep 28, 2026. Refresh pending; these totals may be out of date.
Business information
Public SAM.gov registration details.
- Legal name
- CAPSTONE MECHANICAL & GENERAL CONTRACTOR LLC
- UEI
- VMMHLJVJWG35
- CAGE
- 7ZKB8
- Registered address
- 750 ANDROMEDA STREET, SAN JUAN, PR, 00926, USA
- Registration status
- Active
- Primary NAICS
- 236220 — Commercial and Institutional Building Construction
- SAM activation
- Nov 25, 2025
- Initial registration
- Oct 29, 2017
- Entity start
- Sep 14, 2017
- SAM updated
- Nov 25, 2025
- Registration expires
- Nov 21, 2026
- Fiscal year end
- Dec 31
- Place of incorporation
- PR, USA
Federal award analysis
Net transaction obligations by federal fiscal period.
Transaction history is not available in the loaded data. Annual funding is not estimated from current award totals.
Recent federal awards
Prime contract awards. Select an award to review its history and source evidence.
| Award / description | Awarding agency | Obligations | Start date | End date |
|---|---|---|---|---|
| 12639523C0088HVAC CHILLER REPLACEMENT, CAROLINA, PR | Department of Agriculture | $458.6K | Aug 7, 2023 | Mar 31, 2026 |
| 12FPC325C0004USDA NRCS CARIBBEAN AREA REQUIRES A LICENSED ELECTRICIAN TO PERFORM ELECTRICAL SERVICES AT JUANA DIAZ FIELD OFFICE, PUERTO RICO. | Department of Agriculture | $3.9K | Oct 1, 2025 | Oct 31, 2025 |
| 2043FY24P00236ORDER FOR LOGISTICS SUPPORT SERVICES IN PUERTO RICO | Department of the Treasury | $2.0M | Sep 19, 2024 | Sep 18, 2029 |
Upcoming positioning windows
Modeled recompete windows are estimates, not announced solicitations or guarantees.
Registration, certifications & contacts
| Registration evidence | Date |
|---|---|
| SAM updated | Nov 25, 2025 |
| Source loaded | Sep 26, 2026 |
| Initial registration | Oct 29, 2017 |
| Entity start | Sep 14, 2017 |
Expires Feb 24, 2031
SAM public SBA certification fieldsRegistration classifications: Self Certified Small Disadvantaged Business, Small Business, SBA Certified 8A Program Participant. These are separate from the reported certificates above.
| Industry | Reported size status |
|---|---|
| 221114 — Solar Electric Power Generation | Not reported |
| 221122 — Electric Power Distribution | Not reported |
| 236115 — New Single-Family Housing Construction (except For-Sale Builders) | Not reported |
| 236116 — New Multifamily Housing Construction (except For-Sale Builders) | Not reported |
| 236118 — Residential Remodelers | Not reported |
| 236210 — Industrial Building Construction | Not reported |
| 236220 — Commercial and Institutional Building Construction | Not reported |
| 237110 — Water and Sewer Line and Related Structures Construction | Not reported |
| 237120 — Oil and Gas Pipeline and Related Structures Construction | Not reported |
| 237130 — Power and Communication Line and Related Structures Construction | Not reported |
| 237310 — Highway, Street, and Bridge Construction | Not reported |
| 237990 — Other Heavy and Civil Engineering Construction | Not reported |
| 238110 — Poured Concrete Foundation and Structure Contractors | Not reported |
| 238120 — Structural Steel and Precast Concrete Contractors | Not reported |
| 238130 — Framing Contractors | Not reported |
| 238140 — Masonry Contractors | Not reported |
| 238150 — Glass and Glazing Contractors | Not reported |
| 238160 — Roofing Contractors | Not reported |
| 238190 — Other Foundation, Structure, and Building Exterior Contractors | Not reported |
| 238210 — Electrical Contractors and Other Wiring Installation Contractors | Not reported |
| 238220 — Plumbing, Heating, and Air-Conditioning Contractors | Not reported |
| 238310 — Drywall and Insulation Contractors | Not reported |
| 238320 — Painting and Wall Covering Contractors | Not reported |
| 238330 — Flooring Contractors | Not reported |
| 238340 — Tile and Terrazzo Contractors | Not reported |
| 238350 — Finish Carpentry Contractors | Not reported |
| 238390 — Other Building Finishing Contractors | Not reported |
| 238910 — Site Preparation Contractors | Not reported |
| 238990 — All Other Specialty Trade Contractors | Not reported |
| 332313 — Plate Work Manufacturing | Not reported |
| 332323 — Ornamental and Architectural Metal Work Manufacturing | Not reported |
| 332812 — Metal Coating, Engraving (except Jewelry and Silverware), and Allied Services to Manufacturers | Not reported |
| 333415 — Air-Conditioning and Warm Air Heating Equipment and Commercial and Industrial Refrigeration Equipment Manufacturing | Not reported |
| 423930 — Recyclable Material Merchant Wholesalers | Not reported |
| 541310 — Architectural Services | Not reported |
| 541330 — Engineering Services | Not reported |
| 541350 — Building Inspection Services | Not reported |
| 541611 — Administrative Management and General Management Consulting Services | Not reported |
| 541614 — Process, Physical Distribution, and Logistics Consulting Services | Not reported |
| 541618 — Other Management Consulting Services | Not reported |
| 561612 — Security Guards and Patrol Services | Not reported |
| 561720 — Janitorial Services | Not reported |
| 561730 — Landscaping Services | Not reported |
| 562910 — Remediation Services | Not reported |
| 811310 — Commercial and Industrial Machinery and Equipment (except Automotive and Electronic) Repair and Maintenance | Not reported |
| Contact | Role | Published contact methods | Evidence | Source date |
|---|---|---|---|---|
| DOUGLAS M RIVERA | Government business | Contact method not published | SAM registration | Not available |
| DOUGLAS M RIVERA | Electronic business | Contact method not published | SAM registration | Not available |
| JOSE LAFONTAINE | Alternate electronic business | Contact method not published | SAM registration | Not available |
Registered industries
- 221114 — Solar Electric Power Generation
- 221122 — Electric Power Distribution
- 236115 — New Single-Family Housing Construction (except For-Sale Builders)
- 236116 — New Multifamily Housing Construction (except For-Sale Builders)
- 236118 — Residential Remodelers
- 236210 — Industrial Building Construction
- 236220 — Commercial and Institutional Building Construction
- 237110 — Water and Sewer Line and Related Structures Construction
- 237120 — Oil and Gas Pipeline and Related Structures Construction
- 237130 — Power and Communication Line and Related Structures Construction
- 237310 — Highway, Street, and Bridge Construction
- 237990 — Other Heavy and Civil Engineering Construction
- 238110 — Poured Concrete Foundation and Structure Contractors
- 238120 — Structural Steel and Precast Concrete Contractors
- 238130 — Framing Contractors
- 238140 — Masonry Contractors
- 238150 — Glass and Glazing Contractors
- 238160 — Roofing Contractors
- 238190 — Other Foundation, Structure, and Building Exterior Contractors
- 238210 — Electrical Contractors and Other Wiring Installation Contractors
- 238220 — Plumbing, Heating, and Air-Conditioning Contractors
- 238310 — Drywall and Insulation Contractors
- 238320 — Painting and Wall Covering Contractors
- 238330 — Flooring Contractors
- 238340 — Tile and Terrazzo Contractors
- 238350 — Finish Carpentry Contractors
- 238390 — Other Building Finishing Contractors
- 238910 — Site Preparation Contractors
- 238990 — All Other Specialty Trade Contractors
- 332313 — Plate Work Manufacturing
- 332323 — Ornamental and Architectural Metal Work Manufacturing
- 332812 — Metal Coating, Engraving (except Jewelry and Silverware), and Allied Services to Manufacturers
- 333415 — Air-Conditioning and Warm Air Heating Equipment and Commercial and Industrial Refrigeration Equipment Manufacturing
- 423930 — Recyclable Material Merchant Wholesalers
- 541310 — Architectural Services
- 541330 — Engineering Services
- 541350 — Building Inspection Services
- 541611 — Administrative Management and General Management Consulting Services
- 541614 — Process, Physical Distribution, and Logistics Consulting Services
- 541618 — Other Management Consulting Services
- 561612 — Security Guards and Patrol Services
- 561720 — Janitorial Services
- 561730 — Landscaping Services
- 562910 — Remediation Services
- 811310 — Commercial and Industrial Machinery and Equipment (except Automotive and Electronic) Repair and Maintenance
Registration classifications and published certificates do not by themselves establish eligibility for a particular solicitation. View SAM source
Related companies worth researching
Explore the customer, work and award-size evidence behind each match.
126 awards
31 awards
17 awards
7 awards
5 awards
3 awards
3 awards
Data coverage and methodology
Sources: SAM.gov registration, USAspending awards and transactions, and linked supporting records. Prime contract obligations, IDV ceilings and assistance amounts are kept separate. Missing records are not zero activity. Company claims are labeled separately. Recompete signals are rule-based scores out of 100. Positioning windows are AcornBids estimates.
No official subaward rows are loaded, so Acorn does not claim known teaming relationships.
Recently viewed companies
Keep your research moving
Save this company, track changes, and evaluate upcoming work against your targets.
Save to my research Find my fit