As of July 2026, DataCenterUPS.com tracks 8,417 U.S. contractors serving data centers and mission-critical facilities across 29 major metros and 14 specialty trades. The largest market is New York / New Jersey with 425 contractors, followed by Dallas-Fort Worth (355) and Northern Virginia / Ashburn (353). The most common trade is medium/high-voltage electrical work (1,209 contractors, 14.4% of the directory); the scarcest is commissioning, with just 114 firms nationwide (1.4%). All figures below come directly from the DataCenterUPS.com directory database and are refreshed quarterly.
Key findings
- The top three metros — New York/New Jersey, Dallas-Fort Worth, and Northern Virginia/Ashburn — account for 1,133 contractor listings, about 13.5% of the national total.
- Generator contractors outnumber UPS service firms roughly 1.5 to 1 (1,137 vs 738) — backup power installation capacity is broader than the specialist fleet that maintains the batteries behind it.
- Commissioning and load bank testing are the two scarcest trades: 313 firms combined, under 4% of all contractors. Facilities scheduling Tier certification or acceptance testing face the tightest vendor market in the industry.
- Northern Virginia / Ashburn — “Data Center Alley,” the world’s densest data center corridor — has 353 listed contractors, 1.6× nearby Richmond (215).
- Electrical work in both voltage classes combined (2,116 firms) represents a quarter of the entire directory — reflecting that power distribution remains the core constraint of data center construction.
Contractors by metro area
| Rank | Metro area | Contractors |
|---|---|---|
| 1 | New York / New Jersey | 425 |
| 2 | Dallas-Fort Worth | 355 |
| 3 | Northern Virginia / Ashburn | 353 |
| 4 | Miami | 342 |
| 5 | Boston | 342 |
| 6 | Los Angeles | 340 |
| 7 | Chicago | 338 |
| 8 | Atlanta | 322 |
| 9 | Seattle | 320 |
| 10 | Hillsboro / Portland | 317 |
| 11 | Silicon Valley / San Jose | 309 |
| 12 | Denver | 308 |
| 13 | Houston | 307 |
| 14 | Minneapolis | 302 |
| 15 | Phoenix / Mesa | 298 |
| 16 | Tampa | 287 |
| 17 | Charlotte | 272 |
| 18 | Kansas City | 267 |
| 19 | Indianapolis | 264 |
| 20 | Reno / Las Vegas | 264 |
| 21 | San Antonio | 261 |
| 22 | Columbus | 255 |
| 23 | Salt Lake City | 253 |
| 24 | Nashville | 248 |
| 25 | St. Louis | 229 |
| 26 | Sacramento | 220 |
| 27 | Richmond | 215 |
| 28 | Des Moines | 190 |
| 29 | Omaha | 179 |
Contractors by trade
| Trade | Contractors | Share of directory |
|---|---|---|
| Electrical (Medium/High Voltage) | 1,209 | 14.4% |
| Generator Installation/Service | 1,137 | 13.5% |
| Electrical (Low Voltage/Cabling) | 907 | 10.8% |
| BMS/DCIM Integration | 765 | 9.1% |
| UPS Sales/Service | 738 | 8.8% |
| Mechanical/HVAC/Cooling | 693 | 8.2% |
| Fire Suppression | 665 | 7.9% |
| Rack/Cabinet Installation | 459 | 5.5% |
| General Contractor (DC Build) | 453 | 5.4% |
| Fuel Polishing/Tank Service | 397 | 4.7% |
| EPO/Safety Systems | 328 | 3.9% |
| White Space Cleaning | 320 | 3.8% |
| Load Bank Testing | 199 | 2.4% |
| Commissioning | 114 | 1.4% |
Methodology
Counts reflect published listings in the DataCenterUPS.com directory as of July 20, 2026. Contractors serving multiple metros or trades are counted in each applicable category, so trade shares sum to approximately 100%. The directory is built from public business data plus ongoing editorial research — see how we vet contractors. Cite these figures as: “DataCenterUPS.com Directory Data, July 2026.” This page is updated quarterly; figures may shift as coverage research adds specialist firms and quality control removes miscategorized ones.
Looking for a contractor? Search the full directory by metro and trade, or request quotes from matched firms.