# Holden Mechanical Contractors, Inc.

**Trade:** HVAC / Heating & Cooling · **Part of:** Thielsch Engineering, Inc. · **Address:** 255 Brooks St, Worcester, MA · **Phone:** (508) 853-7375 · **Website:** http://www.holdenmechanical.com/ · **Languages:** English

**Rating: 2.1/5** (low confidence) — from 1 reviews across 5 sources.

## The honest read

Holden Mechanical Contractors is a Worcester-based commercial and industrial mechanical company offering HVAC, heating, air conditioning, refrigeration, plumbing, piping, fabrication, installation, and maintenance services. Its website describes the company as a Thielsch Engineering division and says the larger organization is employee-owned.

The only available customer review, from February 2024, is a one-star complaint about aggressive driving by a company vehicle rather than completed work. The Massachusetts registry lists HVAC license 30-SM-B as expired, while BuildZoom shows separate license claims MA30757P and 30; confirm current licensing before booking.

**Strengths:**
- Commercial mechanical — design, fabrication, installation, and maintenance services
- Industrial HVAC — heating, cooling, refrigeration, and ventilation capabilities

**Concerns:**
- Expired HVAC license — state registry lists 30-SM-B as expired
- Vehicle conduct — one 2024 review alleges aggressive driving

**Where sources disagree:**
- The state registry lists 30-SM-B as expired, while BuildZoom displays separate license claims MA30757P and 30.

## Claims & citations

Every claim below is backed by real evidence rows — uncited claims are dropped in code before publication.

- The company provides commercial and industrial mechanical, HVAC, plumbing, piping, fabrication, installation, and maintenance services. _(confidence: high)_
  - [Official Website](http://www.holdenmechanical.com) — “Holden Mechanical Contractors provides commercial and industrial mechanical design, fabrication, installation, maintenance, plumbing, piping…”
- The website identifies the company as a Thielsch Engineering division and states employee ownership. _(confidence: high)_
  - [Official Website](http://www.holdenmechanical.com) — “Ownership (self-reported): A division of Thielsch Engineering, Inc.”
  - [Official Website](http://www.holdenmechanical.com) — “Stated ownership (self-reported): Employee-owned”
  - [Official Website](http://www.holdenmechanical.com) — “Operates under (self-reported): Thielsch Engineering, Inc. (network)”
- The state registry lists HVAC license 30-SM-B as expired. _(confidence: high)_
  - [State License Registry](https://occupationallicensingandpermitting.mass.gov/madol/s/license-search-page) — “MA hvac license 30-SM-B registry-verified expired — registry holder of record: Holden Mechanical Contractors Inc”
- A February 2024 Google review alleges aggressive driving by a company vehicle. _(confidence: high)_
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sChdDSUhNMG9nS0VJQ0FnSUR0OHE3TDFRRRAB!2m1!1s0x0:0x266974fcf2958dd!3m1!1s2@1:CIHM0ogKEICAgIDt8q7L1QE%7C%7C?hl=en) — “1★ Nearly ran me off the road twice on 190. Gray truck with racks. Aggressive driving and carelessness isn't a great look, especially when y…”
- Specializes in HVAC / Heating & Cooling _(confidence: high)_
  - [Official Website](http://www.holdenmechanical.com) — “Holden Mechanical Contractors provides commercial and industrial mechanical design, fabrication, installation, maintenance, plumbing, piping…”
  - [BuildZoom](https://www.buildzoom.com/contractor/holden-mechanical-concrat) — “Services offered (BuildZoom): Mechanical Work, Sheet Metal Work, HVAC”
- Also offers Plumbing _(confidence: high)_
  - [Official Website](http://www.holdenmechanical.com) — “Holden Mechanical Contractors provides commercial and industrial mechanical design, fabrication, installation, maintenance, plumbing, piping…”
  - [Procore Construction Network](https://network.procore.com/p/holden-mechanical-contractors-inc-worcester) — “Services offered (Procore Construction Network): Heating Ventilating and Air Conditioning HVAC, Plumbing”
- Also offers Specialty Services _(confidence: medium)_
  - [Official Website](http://www.holdenmechanical.com) — “Holden Mechanical Contractors provides commercial and industrial mechanical design, fabrication, installation, maintenance, plumbing, piping…”
  - [BuildZoom](https://www.buildzoom.com/contractor/holden-mechanical-concrat) — “Services offered (BuildZoom): Mechanical Work, Sheet Metal Work, HVAC”

## Ownership

- Identifies as employee-owned — the business's own statement, not independently verified.

## License

Status: **expired** (#30-SM-B, hvac) — verified against the official MA state registry on 2026-08-24, never self-reported.
Re-check at the official registry: https://occupationallicensingandpermitting.mass.gov/madol/s/license-search-page

## Sources

- [Google](https://www.google.com/maps/search/?api=1&query=Holden%20Mechanical%20Contractors%2C%20Inc.&query_place_id=ChIJf7BurocH5IkR3Vgpz0-XZgI): 1.0★ from 1 ratings
- [Google Reviews](https://www.google.com/maps/search/?api=1&query=Holden%20Mechanical%20Contractors%2C%20Inc.&query_place_id=ChIJf7BurocH5IkR3Vgpz0-XZgI): Listed on this source
- [Official Website](http://www.holdenmechanical.com): Self-reported profile and service details
- [Procore Construction Network](https://network.procore.com/p/holden-mechanical-contractors-inc-worcester): Listed on this source
- [BuildZoom](https://www.buildzoom.com/contractor/holden-mechanical-concrat): Listed on this source

## Recent reviews

- **1/5 · Google Reviews · DJ Ware · 2024-02-03**: Nearly ran me off the road twice on 190. Gray truck with racks. Aggressive driving and carelessness isn't a great look, especially when your vehicle has the company name on it.

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Data freshness: last scanned 2026-08-24T21:50:15.615Z.
Cite as: Holden Mechanical Contractors, Inc. — Tavlee (https://tavlee.com/contractor/holden-mechanical-contractors-inc-worcester)
Source: https://tavlee.com/contractor/holden-mechanical-contractors-inc-worcester