ACCO Engineered Systems
ACCO Engineered Systems is a 100% employee-owned mechanical contractor providing design, fabrication, installation, and maintenance of HVAC, plumbing, process piping, and building automation systems for commercial and industrial facilities across the Western United States.
- Company typePrivate
- Founded1934
- HeadquartersGlendale, United States
- Headcount1,001–5,000
- GTM typeB2B
- OfferingServices
What ACCO Engineered Systems does
ACCO Engineered Systems is a privately held, 100% employee-owned (ESOP) mechanical contractor founded in 1934 in Los Angeles and now headquartered in Pasadena, California. The company designs, fabricates, installs, and services commercial and industrial mechanical systems — including HVAC piping, plumbing, process piping, sheet metal, industrial and low-temperature refrigeration, fire sprinklers, building automation, and mission-critical mechanical infrastructure — for healthcare, data centers, semiconductor and pharmaceutical fabrication facilities, entertainment venues (such as SoFi Stadium), government, and education customers across the Western United States. The firm operates an integrated delivery model combining in-house engineering, BIM/VDC, large-scale fabrication (12+ million pounds of sheet metal and 160,000+ diameter inches of prefabricated piping annually), installation, commissioning, and ongoing facility service. Revenue is generated through construction project contracts (including mission-critical projects ranging from $80M to $500M) and a $2 billion+ recurring service business serving 9,000+ maintenance accounts through the ACCOCare, ACCOGuard, and Predictive Diagnostic Services programs, supported by a fleet of 500+ mobile service vehicles and 24/7 emergency response. Operational footprint spans 40+ offices and manufacturing campuses, licensure in 17 states, and operations in Mexico, with subsidiaries including Sunbelt Controls, Sunbelt Electric, Geo. H. Wilson, Smith MEP, AES Industrial, and AES Electric extending capabilities into building automation, electrical, and regional mechanical contracting.
ACCO Engineered Systems firmographics
Firmographics- Name
- ACCO Engineered Systems
- Legal name
- ACCO Engineered Systems
- Website
- https://accoes.com
- Company type
- Private
- Founded year
- 1934
- Operating status
- Operating
- Headcount range
- 1,001–5,000 employees
- Short description
- ACCO Engineered Systems is a 100% employee-owned mechanical contractor providing design, fabrication, installation, and maintenance of HVAC, plumbing, process piping, and building automation systems for commercial and industrial facilities across the Western United States.
- Ownership category
- akta.pro rank
ACCO Engineered Systems industry classification
Industry- Product category
- Mechanical Contracting Services
- NAICS
- Air-Conditioning and Warm Air Heating Equipment and Commercial and Industrial Refrigeration Equipment Manufacturing (333415), Commercial and Service Industry Machinery Manufacturing (333310)
- SIC
- Air-Cond & Warm Air Heatg Equip & Comm & Indl Refrig Equip (3585), Refrigeration & Service Industry Machinery (3580)
- akta.pro primary industry
- Industrial & Cleanroom Fit-Out (Factories, Warehouses, Controlled Environments) (IMAFANAF)
- akta.pro secondary industries
- Commercial HVAC Maintenance Agreements & PM Programs (HSAOAHAJ), Ventilation, Ducting & Air Distribution Equipment (IMAHAKAG)
Keywords
Where ACCO Engineered Systems is headquartered
LocationHeadquarters
- HQ city
- Glendale
- HQ country
- United States
- HQ region
- North America
Offices18 records
Markets served
ACCO Engineered Systems business model
Business model- GTM type
- B2B
- Offering type
- Services
- Cost components
- Personnel, Supply Chain, Operations, Infrastructure, Technology or R&D, Marketing or Sales
Revenue model
- Construction Projects: Design, fabrication, and installation of mechanical systems for commercial and industrial buildings. Revenue is project-based, typically large-scale construction contracts ranging from simple installations to complex semiconductor and bio-tech fabrication facilities.
- Facility Service and Maintenance: Ongoing service and maintenance agreements for HVAC, plumbing, and building automation systems. Provides long-term maintenance contracts including ACCOCare, ACCOGuard, and Predictive Diagnostic Services to over 9,000 accounts.
- Emergency Repair Services: 24/7 emergency response services with rapid on-site field response. Over 500 truck and sprinter van-based mobile field mechanics available to respond on-site in less than four hours.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Subscription | Monthly | ACCOCare - Basic Preventive Maintenance |
| Subscription | Monthly | ACCOGuard - Comprehensive Coverage |
| Other | Annual | Predictive Diagnostic Services |
Go-to-market motion1 record
Distribution channels4 records
Marketing channels5 records
ACCO Engineered Systems product offering
Product offeringCore offering
ACCO designs, engineers, fabricates, installs, and services mechanical systems including HVAC, plumbing, refrigeration, process piping, sheet metal, and building automation for commercial, industrial, and institutional facilities. The company delivers these systems through an integrated in-house model combining BIM/VDC-driven prefabrication, construction, and recurring facility service under long-term maintenance agreements.
Product overview
ACCO Engineered Systems is a mechanical contracting company offering a comprehensive portfolio of integrated construction and facility service solutions. The core offering consists of Construction Services (including engineering, fabrication, HVAC piping, plumbing, process piping, sheet metal, industrial construction, refrigeration, fire sprinklers, and commissioning) and Facility Service (including preventive maintenance programs like ACCOCare, ACCOGuard, and Predictive Diagnostic Services). The company operates six subsidiaries: Sunbelt Controls (building automation), Sunbelt Electric (electrical), Geo. H. Wilson (plumbing/heating), Smith MEP (MEP subcontracting), AES Industrial (mechanical-industrial), and AES Electric (Colorado electrical). The integrated delivery system combines in-house engineering, fabrication, installation, and service capabilities to provide complete mechanical and control system solutions for commercial, industrial, and institutional facilities.
Differentiator
Problem solved
Functional benefit
Products and services
- Construction Services Comprehensive mechanical construction services for commercial and industrial facilities, including engineering, project management, BIM and VDC, fabrication, HVAC piping, industrial construction, process piping, energy optimization, plumbing, rigging, sheet metal, low-temperature industrial refrigeration, site utilities, fire sprinklers, mission critical facilities, and commissioning. Customers include healthcare, data center, pharmaceutical, semiconductor, government, and industrial facility owners.
- Facility Service Ongoing facility maintenance and service offerings including HVAC service, plumbing service, chiller service, energy management, equipment repairs, mechanical retrofits, strategic accounts management, and preventive maintenance programs such as ACCOCare, ACCOGuard, and Predictive Diagnostic Services, serving over 9,000 commercial accounts across the Western United States.
- Fabrication In-house sheet metal and piping fabrication services through fully automated, computer-aided facilities that produce more than 12 million pounds of fabricated sheet metal annually and prefabricate more than 160,000 diameter inches of welded and grooved HVAC, plumbing, and process piping for construction projects.
- Mission Critical Services End-to-end mechanical solutions for zero-downtime environments including data centers, advanced manufacturing, and power infrastructure, with project values typically ranging from $80 million to $500 million and precision engineering for resilience and redundancy.
- Process Piping Advanced process piping systems for pharmaceutical, life science, and semiconductor manufacturing environments, including bulk chemical distribution, ultra-high purity water (WFI), clean-in-place solvents, high-purity gas distribution, cryogenic piping, and ultra-high purity gas delivery systems.
- Industrial Construction Design, construction, and service for industrial facilities across petro/chemical, power, mining, aerospace, food and beverage, water treatment, biomass, and pharmaceutical sectors, with ASME/AWS Quality Program certifications and skilled union labor.
- Low Temperature Industrial Refrigeration Complete turnkey low-temperature refrigeration operation including design, fabrication, service, and maintenance for applications ranging from grocery stores to multi-compressor rack skids for cold storage warehouses, with expertise in natural refrigerants including Ammonia and CO2.
- HVAC Piping Pipe prefabrication and installation services producing more than 120,000 diameter inches of welded pipe annually, including structural members for equipment and pipe support, utilizing plasma cutters and 3D modeling with clash detection.
- Plumbing Service Comprehensive plumbing services including 24/7 emergency response, backflow installation and testing, water heater and boiler services, drain cleaning, equipment repairs, grey water systems, hot-taps, live line services, pipe freezing, plumbing engineering, and predictive diagnostic services for commercial and institutional facilities.
- Chiller Service Expert chiller maintenance and repair services provided by certified specialists trained to service all chiller types regardless of manufacturer, size, or compressor configuration.
- Energy Management Energy efficiency services including energy audits, ASHRAE-compliant analysis, building benchmarking, utility bill review, feasibility studies, Investment Grade Energy audits, Life Cycle Cost Analysis, retro-commissioning, equipment modernization, and Energy STAR certification support.
- ACCOCare Preventive Maintenance Basic preventive maintenance service plan that guarantees a service technician will arrive at the building within 2 or 4 hours to fix mechanical issues, covering filters, annual coil cleanings, water heater flushing, and manufacturer-recommended preventive maintenance.
- ACCOGuard Comprehensive Coverage Enhanced preventive maintenance program that covers all costs for maintenance parts, materials, and labor under contract, providing fixed monthly costs and minimal risk for customers.
- Predictive Diagnostic Services Early warning diagnostic service that evaluates equipment performance trends and schedules major repairs and shutdowns to prevent catastrophic failures and avoid unanticipated downtime.
- Sunbelt Controls (Building Automation) Full-service building automation subsidiary providing engineering applications, automated control systems, design assistance, sustainable maintenance service, retro-commissioning, and energy rebate-supported projects for new construction and retrofit applications.
- Sunbelt Electric Wholly-owned electrical subsidiary that designs, installs, and repairs electrical systems in commercial and industrial buildings across the Western United States, including low, medium, and high voltage projects for commercial buildings, industrial equipment, water treatment plants, refineries, and government-owned locations.
- AES Electric Wholly-owned subsidiary designing, installing, and repairing electrical systems for industrial and commercial buildings across Colorado, serving PK-12 education, higher education, government, healthcare, and industrial clients.
- AES Industrial (AESI) Wholly-owned subsidiary delivering mechanical-industrial applications including piping fabrication, welding, scanning, industrial refrigeration, and site utilities services with an engineering-oriented approach and skilled union labor.
- Geo. H. Wilson Acquired wholly-owned subsidiary providing plumbing and heating services to schools, hospitals, institutions, and homes in the Santa Cruz and Central Coast area of California with sustainable best practices.
- Smith MEP Wholly-owned mechanical, electrical, and plumbing subcontractor based in Santa Maria, California, serving California's Central Coast and Central Valley with commercial, industrial, and residential services since 1989.
Quantifiable outcome
- 250,000+ mechanical projects completed since 1934
- +5 more outcomes
Companies that use ACCO Engineered Systems
Customer profileNamed customers16 records
Segments8 records
Ideal customer profiles6 records
ACCO Engineered Systems technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature3 records
ACCO Engineered Systems partnerships and signals
Strategic signalPartnerships
Three partnerships are on record, tiered minor and core.
- International Institute of All-Natural Refrigeration (IIAR)minorACCO is a proud member of IIAR, the International Institute of All-Natural Refrigeration, supporting the industrial refrigeration industry with expertise in natural refrigerants including Ammonia and CO2.
- United Association (UA)coreACCO collaborates with the United Association union nationwide to engage skilled craftspeople in HVACR, pipefitting, plumbing, sprinkler fitting, and welding trades. Union apprenticeships provide paid hands-on training with competitive wages and benefits.
- SMART (Sheet Metal Air Rail Transportation)coreACCO partners with SMART union for sheet metal workers, HVAC installation, fabrication, service, refrigeration, CAD/drafting, and industrial welding trades. Union membership provides job security and career advancement opportunities.
Scale indicators13 records
Recent moves8 records
Expansion highlights5 records
ACCO Engineered Systems competitors and assessment
Company assessmentDirect peers
- EMCOR Group: Largest publicly traded U.S. mechanical & electrical construction and facilities services company. EMCOR competes with ACCO across commercial, industrial, healthcare, data center, and semiconductor mechanical contracting with national scale and a similar integrated project + recurring service model.
- Comfort Systems USA: Leading U.S. mechanical contractor delivering HVAC, plumbing, and building automation for commercial and industrial customers. Direct overlap with ACCO in commercial HVAC installation and maintenance contracting, with national footprint vs. ACCO's Western U.S. focus.
- Southland Industries: Large private mechanical contractor providing design-build HVAC, plumbing, and building automation across the Western U.S. Closely comparable to ACCO in scope, geography, integrated delivery model, and target verticals including healthcare, data centers, and higher education.
- TDIndustries: Private, 100% employee-owned mechanical contractor serving commercial, industrial, and institutional markets in the Southwest. Highly comparable to ACCO in ESOP culture, mechanical services breadth, and integrated project/service model.
- Limbach Holdings: Public mechanical contractor focused on commercial HVAC, plumbing, and building automation with significant data center and healthcare exposure. Direct overlap with ACCO on mission-critical and institutional mechanical contracting, though at smaller scale.
- S&B Engineers and Constructors: Private industrial engineering and mechanical/electrical contractor serving petrochemical, power, and process industries. Comparable to ACCO's Industrial Construction and Process Piping practices for petro/chemical, power, and pharma customers.
Broad incumbents
- APi Group: Public holding company with safety, specialty, and industrial services including mechanical contracting through subsidiaries. Overlaps with ACCO's broader mechanical and life-safety services across commercial and industrial end markets at greater geographic scale.
- IES Holdings: Public electrical and mechanical services contractor with strong data center, commercial, and industrial exposure. Overlaps with ACCO on commercial MEP work, especially in mission-critical and data center mechanical delivery.
Emerging players
- Cupertino Electric: Large private electrical contractor with deep data center, semiconductor, and biotech exposure across the Western U.S. Adjacent to ACCO on mission-critical mechanical scopes in data center and semiconductor verticals, primarily via Sunbelt Electric subsidiary overlap.
Regional players
- Baker Mechanical: Western U.S. mechanical contractor headquartered in Nevada, providing HVAC, plumbing, and process piping for commercial, industrial, and hospitality customers. Regional peer overlapping with ACCO's Nevada and broader Western U.S. construction footprint.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat6 records
Key risks6 records
Key highlights7 records
Customer concentration
ACCO Engineered Systems social profiles
Digital presenceACCO Engineered Systems financial estimates
Financial estimateRevenue estimate
Valuation estimate
ACCO Engineered Systems leadership team
Management profileNumber of profiles
Profiles5 records
ACCO Engineered Systems subsidiaries and ownership
Company hierarchySubsidiaries6 records
ACCO Engineered Systems funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
ACCO Engineered Systems M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about ACCO Engineered Systems
What does ACCO Engineered Systems do?
ACCO designs, engineers, fabricates, installs, and services mechanical systems including HVAC, plumbing, refrigeration, process piping, sheet metal, and building automation for commercial, industrial, and institutional facilities. The company delivers these systems through an integrated in-house model combining BIM/VDC-driven prefabrication, construction, and recurring facility service under long-term maintenance agreements.
Is ACCO Engineered Systems a public or private company?
ACCO Engineered Systems is a private company. It is classified as management employee owned and is currently operating.
When was ACCO Engineered Systems founded?
ACCO Engineered Systems was founded in 1934. It employs 1,001 to 5,000 people.
Where is ACCO Engineered Systems based?
ACCO Engineered Systems is headquartered in Glendale, United States, in the North America region.
How does ACCO Engineered Systems make money?
Three revenue lines are on record. Construction Projects are the primary driver. The others are facility Service and Maintenance and emergency Repair Services.
Who are ACCO Engineered Systems's main competitors?
Direct peers on record are EMCOR Group, Comfort Systems USA, Southland Industries, TDIndustries, Limbach Holdings and S&B Engineers and Constructors. Broad incumbents are APi Group and IES Holdings. Cupertino Electric is listed as an emerging player. Baker Mechanical is listed as a regional player.
Does ACCO Engineered Systems have an API?
No public API is recorded for ACCO Engineered Systems.
What industry is ACCO Engineered Systems in?
ACCO Engineered Systems's product category is Mechanical Contracting Services. Its primary akta.pro industry code is IMAFANAF, Industrial & Cleanroom Fit-Out (Factories, Warehouses, Controlled Environments), with a secondary code of HSAOAHAJ, Commercial HVAC Maintenance Agreements & PM Programs. Its NAICS code is 333415 and its SIC code is 3585.