Independent Mechanical Industries

What Independent Mechanical Industries does

Independent Mechanical Industries (IMI) is a family-owned, full-service mechanical contracting firm headquartered in Elk Grove Village, Illinois, founded in 1923 and operated across four generations by the Reynolds family. The company installs and maintains mechanical equipment, process and industrial piping, HVAC systems, boilers and pressure vessels, and water and wastewater treatment infrastructure for municipal, government, and industrial clients in Illinois, northern Indiana, and southern Wisconsin. IMI holds six ASME code stamps and a National Board R Stamp, performs approximately 450,000 man-hours of work annually with an EMR of 0.84, and operates a Contract Maintenance division that completes over 1,000 individual jobs per year with 2-hour, 24/7 emergency response.

IMI delivers projects through Plan-Spec-Bid, Time and Materials, Design-Build, EPC, and Job Order Contract (JOC) delivery methods, with pricing structured as fixed-price contracts, T&M billing, or pre-negotiated JOC rates. Project values range from a few thousand dollars to multi-million dollar engagements, serving customers including the Metropolitan Water Reclamation District of Greater Chicago, the City of Chicago Department of Aviation (O'Hare), University of Chicago, Abbott, ArcelorMittal, Caterpillar, ExxonMobil, and Argonne National Laboratory. The company's go-to-market is relationship-driven, enterprise field sales targeting infrastructure, power, refining, chemical, steel, food/pharmaceutical processing, and research facilities, supplemented by subcontractor arrangements with general contractors such as Black and Veatch and Bovis Lend Lease. Revenue is generated entirely from project-based and contract maintenance work; the company has no software product, app, or recurring subscription revenue.

IMI differentiates through its in-house fabrication shop, 2D/3D AutoCAD design capability, dozens of pre-authorized welding procedures for exotic materials, and pioneering credentials in sustainable wastewater treatment, including the world's largest nutrient recovery facility at the MWRD Stickney Plant. The company maintains a DBE/MBE/WBE compliance program for public works contracts and operates with no disclosed outside shareholders, no institutional investment, and no M&A activity.

Name

Independent Mechanical Industries

Legal name

Independent Mechanical Industries, Inc.

Website

https://independentmech.com

Company type

Private

Founded year

1923

Operating status

Operating

Headcount range

101–250 employees

Short description

Independent Mechanical Industries is a family-owned mechanical contractor providing industrial piping, HVAC, heat and power, water/wastewater treatment, and contract maintenance services to municipal, government, and industrial clients across Illinois, northern Indiana, and southern Wisconsin. Founded 1923.

Ownership category

akta.pro rank

Product category

Mechanical Contracting Services

NAICS

Industrial Machinery Manufacturing (3332), Other General Purpose Machinery Manufacturing (3339)

SIC

Special Industry Machinery, Nec (3559), General Industrial Machinery & Equipment (3560)

akta.pro primary industry

Industrial/Process Piping & Mechanical Contracting (IMAFALAG)

akta.pro secondary industries

Plumbing & Utility Systems (Potable/Non-Potable Water, Sanitary, Storm, Sewage Lift) (EUAEAFAF), Specialty Power Systems MRO (Generators, Compressors, Pumps, Welders) (TLAKAHAJ)

Keywords

• Mechanical contracting services
• Industrial piping installation
• HVAC system services
• Boiler installation maintenance
• Wastewater treatment systems

Headquarters

HQ city

Elk Grove Village

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Supply Chain, Technology or R&D, Infrastructure, Marketing or Sales

Revenue model

1. Industrial Piping Projects: Fixed price contracts or time and materials billing for construction and maintenance services. Projects range from a few thousand dollars to multi-million dollar engagements. Services include piping systems for boiler installations, power plants, refineries, chemical plants, steel mills, water/sewage treatment, and food/pharmaceutical processing.
2. Contract Maintenance Services: Time & Materials or Lump Sum basis for ongoing maintenance contracts. The Contract Maintenance & Service division performs over 1,000 individual jobs per year. Plan and spec, JOC (Job Order Contract) arrangements available.
3. HVAC Services: Design-build, design-assist or traditional plans and specifications for HVAC buildouts and rehabilitation. Can work as subcontractors or prime contractors. In-house fabrication extends value of field operations.
4. Heat and Power Installation: Complete turnkey installation of boilers, pressure vessels, smokestacks, dust collectors, heat exchangers, waste heat recovery systems. From smallest commercial installation to largest power plant, refinery and chemical plant project. Includes maintenance and outage projects from simple boiler tube replacement to major plant outages.

Pricing tiers

Go-to-market motion2 records

Distribution channels2 records

Marketing channels3 records

Core offering

Independent Mechanical Industries is a full-service mechanical contractor that installs, repairs, and maintains mechanical equipment, process and industrial piping, HVAC systems, and heat and power equipment (boilers, pressure vessels, heat exchangers) for industrial, municipal, and government clients. The company also delivers water and wastewater treatment projects, resource recovery installations, and ongoing contract maintenance services, executing work as both prime contractor and subcontractor on projects ranging from a few thousand dollars to multi-million dollar engagements.

Product overview

Independent Mechanical Industries (IMI) is a full-service mechanical contracting company that offers a comprehensive portfolio of interconnected services rather than a single unified software product. The core offerings include Water and Wastewater Services, Process & Industrial Piping, HVAC Services, Heat and Power Services, Contract Maintenance Services, Resource Recovery Services, and Support Services with various Delivery Methods. These divisions work together from conception to completion, allowing IMI to provide complete turnkey services on projects of various sizes and complexities. The company utilizes the latest technologies for estimating, scheduling, design, coordination, fabrication, and project management.

Differentiator

Problem solved

Functional benefit

Products and services

• Water and Wastewater Services
• Process & Industrial Piping Provides construction and maintenance services for piping systems in power plants, refineries, chemical plants, steel mills, and other industrial facilities. Capable of performing high-performance welding and other services on carbon steel, stainless steel, hastelloy, chrome, and exotic materials.
• HVAC Services Provides HVAC build-outs, rehabilitation projects, estimation, design, and management services. The division can work in design-build, design-assist, or traditional plans and specifications capacity and serves as either prime contractor or subcontractor.
• Heat and Power Services Provides complete installation and repair of boilers, pressure vessels, smokestacks, dust collectors, heat exchangers, waste heat recovery systems, and all associated equipment for commercial installations through to power plant, refinery, and chemical plant projects. Includes maintenance and outage projects from simple boiler tube replacement to major plant outages.
• Contract Maintenance Services Provides ongoing contract maintenance services to municipalities, government agencies, and industrial clients. Performs over 1,000 individual jobs per year with 2-hour emergency response 24 hours a day, covering mechanical work on boilers, chillers, HVAC systems, and control work on a Time & Materials, Lump Sum, Plan & Spec, or JOC basis.
• Resource Recovery Services Provides wastewater treatment that evolves into water resource recovery, including phosphorus recovery and stormwater management. Includes work on nutrient recovery facilities using technologies like Ostara's nutrient recovery technology, as deployed at the MWRD's Stickney Water Reclamation Plant.
• Support Services and Delivery Methods Includes complete digital imaging with 2D and 3D design capability, high performance welding with dozens of pre-authorized welding procedures, project logistics and material handling solutions, pre-construction services, customized job cost control, and project-specific safety plans. Multiple delivery methods are supported, including Plan-Spec-Bid, Time & Materials, Design/Build, EPC, and JOC.

Quantifiable outcome

• Over 1,000 jobs performed per year by Contract Maintenance division
• +4 more outcomes

Named customers16 records

Segments6 records

Ideal customer profiles5 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

Four partnerships are on record, tiered core.

• Black & VeatchcoreImplementation/ SI/ Consulting PartnerBlack & Veatch served as the primary client on the MWRD Nutrient Recovery Facility at Stickney Water Reclamation Plant. IMI participated in design and installation of the world's largest nutrient removal process within the wastewater treatment plant.
• Bovis Lend LeasecoreStrategic or Co-development PartnerBovis Lend Lease was the client for IMI's work on the University of Chicago campus utility plant project. IMI was a member of the Design Assist and Project Management team during all phases.
• City of Chicago, Department of AviationcoreStrategic or Co-development Partner40+ year ongoing relationship providing heating, refrigeration, and HVAC maintenance services at O'Hare International Airport. All work performed in accordance with ASME codes, ANSI standards, and City of Chicago regulations.
• Metropolitan Water Reclamation District of Greater Chicago (MWRD)coreStrategic or Co-development PartnerLong-standing relationship since the 1930s with IMI providing contract maintenance services to local water and wastewater departments. Major projects include Zimpro wet oxidation reactor in the 1950s, biosolids pelletization plant in 2006, and nutrient recovery facility in 2017.

Scale indicators6 records

Recent moves6 records

Expansion highlights5 records

Broad incumbents

• EMCOR Group: Largest publicly traded mechanical and electrical construction services firm in the U.S. EMCOR's industrial services and commercial mechanical contracting divisions directly overlap IMI's industrial piping, HVAC, and boiler work, with a much broader national footprint.
• Comfort Systems USA: National HVAC and mechanical services provider operating through 40+ operating companies. Overlaps directly with IMI's HVAC buildout, design-assist, and contract maintenance work, though Comfort Systems is more commercial-tilted.
• APi Group: Public safety, specialty, and industrial services conglomerate with substantial mechanical contracting and process piping exposure through subsidiaries. Broader scope than IMI but directly overlaps in industrial and energy mechanical services.
• MYR Group: Public specialty contractor serving electrical construction and commercial/industrial markets. Overlaps with IMI on industrial mechanical and piping work at power plants, refineries, and process facilities.
• IES Holdings: Public electrical and mechanical contractor with industrial, commercial, and data center focus. Comparable to IMI in industrial mechanical services and process piping, though broader in scope and geographic reach.

Direct peers

• Limbach Holdings: Public specialty mechanical services contractor focused on HVAC, plumbing, and process piping for institutional, commercial, and industrial customers. Closest publicly traded pure-play comparable to IMI's mechanical contracting model.
• U.S. Engineering Company: Large privately held mechanical contractor with deep expertise in industrial piping, HVAC, and process mechanical work for power, refining, and water/wastewater — a closely comparable business to IMI in scope and customer mix.
• Murphy Company: Privately held mechanical contractor with similar Midwest roots providing process piping, HVAC, and industrial mechanical services. Comparable in business model, customer mix (industrial, institutional, government), and self-perform fabrication capabilities.
• Sterling Industrial: Privately held specialty mechanical and process contractor with industrial piping, boiler, and pressure vessel capabilities. Comparable scope and business model to IMI, focused on power, refining, and chemical plant work.

Regional players

• Petillo Industrial: Privately held industrial mechanical and process piping contractor serving the Northeast. Comparable in core capabilities (process piping, boiler work, industrial MRO) but operates in a different geography than IMI.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

Compliance5 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles3 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Independent Mechanical Industries