Inserv

What Inserv does

Inserv (legal name: Integrated Service Company) is a privately held, US-based industrial construction and energy services contractor headquartered in Tulsa, Oklahoma, operating since 1995 and reorganized in 2022 as a single corporate umbrella over seven to nine specialized operating divisions. The company delivers integrated mechanical, construction, turnaround, manufacturing, heater, tank, scaffolding, inspection, and millwright services directly to enterprise customers at their plant sites, with 200+ permanent field staff scaling to roughly 1,200 personnel during the Spring and Fall refinery turnaround peak seasons. Its primary markets are US oil refining and petrochemical facilities, with secondary exposure to power, ammonia, agribusiness, mining, renewables, hydrogen, emerging technologies, and food and beverage processing.

The company's technical core sits in two differentiated areas: (1) Great Southern Technologies (GST), a specialty heater engineering subsidiary in Broken Arrow, OK that holds a registered patent on flameless combustion technology delivering 3-8 ppm NOx without SCR at 91% LHV efficiency, supplemented by proprietary heater performance analysis software, in-house CFD modeling, and tight-sealing observation doors for fired heaters; and (2) the Tank Inspection & Consulting Services division, which uses the proprietary MST-10 multisensory Tank Floor Scanner alongside magnetic flux leakage, NDT, and 3D scanning for API-653 inspections, having completed over 1,000 internal and 3,000+ external inspections since founding in 2015 with a 9+ year recordable-free safety record.

Inserv operates a project-based, quote-driven revenue model across multiple revenue streams — Field Services, Construction & Turnaround Services, Manufacturing Services, Heater Services, Project Services, Scaffolding & Insulation, Tank Services, and Tank Inspection & Consulting — sold through direct enterprise field sales with 24/7 emergency response as a key demand driver. Its 28-acre Tulsa facility, 135+ truckloads of owned cuplock scaffolding, in-house manufacturing capacity for FCCU components and process heaters, and skilled union-affiliated labor pool form the capital and operational backbone that supports large multi-discipline projects such as the Saint Croix Plant Restart (approximately 2 million manhours, 162,809 LF of piping installed). Revenue, ownership structure, and customer concentration are not publicly disclosed.

Name

Inserv

Legal name

Integrated Service Company

Website

https://inservusa.com

Company type

Private

Founded year

1995

Operating status

Operating

Headcount range

251–500 employees

Short description

Inserv (Integrated Service Company) is a private Tulsa-based industrial construction and energy services contractor that delivers integrated mechanical, turnaround, heater, tank, and inspection services through seven divisions directly to US refining, petrochemical, and process-plant operators, with 200–1,200 personnel mobilized for Spring and Fall turnaround seasons.

Ownership category

akta.pro rank

Product category

Industrial Construction & Energy Services

NAICS

Other Building Equipment Contractors (23829)

SIC

Heating Equipment, Except Electric & Warm Air Furnaces (3433)

akta.pro primary industry

Construction Management & General Contracting (EPCM, Scheduling, QA/QC, HSE) (EUAMAFAJ)

Keywords

• Industrial construction services
• Refinery turnaround services
• Heater engineering services
• Tank inspection services
• Petrochemical maintenance services

Headquarters

HQ city

Tulsa

HQ country

United States

HQ region

North America

Offices4 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Field Services: Project-based field services including emergency response, turnaround services, FCC revamps, heater erection, mechanical and exchanger services. Services delivered directly to customer sites with company-owned equipment and workforce.
2. Construction & Turnaround Services: Unit turnarounds, FCCU events, refractory services, and new construction services for refining, chemical, and agricultural markets. CTS has completed 2000+ projects since 1995.
3. Manufacturing Services: Manufacturing of FCCU components, piping, specialty welding, and process heaters/furnace components for worldwide delivery.
4. Heater Services (GST): Design, engineering, fabrication, and installation of combustion heat transfer equipment including new API-560 heaters, revamps, analysis, and emergency response.
5. Project Services: Project management, engineering oversight, procurement, construction management, and commissioning support for client projects.
6. Tank Services: New tank construction, tank repair and maintenance, API 650/620 compliance, floating roof systems, and geodesic dome roofs.
7. Tank Inspection & Consulting: API-653 inspections (internal and external), STI/SPCC inspections, magnetic flux leakage scans, non-destructive testing, and 3D scanning services. Over 1,000 API-653 internal and 3,000+ external inspections completed.

Go-to-market motion2 records

Distribution channels1 record

Marketing channels5 records

Core offering

Inserv is a single-source industrial construction and energy services general contractor organized as an umbrella of seven operating divisions delivering field services, construction and turnaround, manufacturing, heater engineering, project management, scaffolding and insulation, tank construction/repair, tank inspection/consulting, and millwright/machining services. The company dispatches its own workforce and equipment directly to customer plant sites for project-based work including unit turnarounds, FCCU revamps, 24/7 emergency response, and new construction across refining, petrochemical, power, and adjacent heavy-industrial markets.

Product overview

InServ (Integrated Service Company) operates as a single-source industrial construction and energy services contractor comprising seven divisions that work in combination as one unified company. The portfolio includes Field Services (mechanical, exchanger, and turnaround services with 24/7 emergency response), Construction & Turnaround Services (CTS specializing in FCCU/cat cracker events and refractory work), Manufacturing Services (FCCU components and process heaters), Great Southern Technologies/Heater Services (API-560 heaters, flameless combustion technology, SCR and air preheat systems), Project Services (full project lifecycle management), Scaffolding & Insulation Services, Tank Services (new construction and repair), and Tank Inspection & Consulting Services (API-653 certified inspections with advanced scanning technology). The company also includes a Millwright and Machining division for rotating equipment maintenance and installation. Markets served include Refining, Petro-Chemical, Renewables, Power, Ammonia, Agribusiness, Mining, Emerging Technologies, Hydrogen, and Food & Beverage.

Differentiator

Problem solved

Functional benefit

Products and services

• Field Services Mechanical, exchanger, turnaround, heater erection/revamp, FCC revamp, and 24/7 emergency response services delivered by Inserv's own workforce and equipment to enterprise refining and petrochemical plant sites.
• Construction & Turnaround Services (CTS) Construction and turnaround services for FCCU (cat cracker) events, emergency events, unit turnarounds, refractory work, and new construction serving refining, chemical, and agricultural markets.
• Manufacturing Services Manufacturing of FCCU components, piping, specialty welding, and process heater and furnace components for worldwide delivery.
• Great Southern Technologies / Heater Services Specialty engineering, design, fabrication, and installation of API-560 direct fired heaters, heater revamps, auxiliary equipment (SCR, air preheat, waste heat recovery), and emergency response for refinery and petrochemical operators.
• Project Services Strategic project oversight including advisory, engineering management, procurement, construction management, commissioning support, and project controls and reporting across the project lifecycle.
• Scaffolding & Insulation Services Industrial scaffolding and insulation services with owned cuplock scaffolding inventory supporting construction and turnaround projects.
• Tank Services New tank construction, repair, and maintenance including API 650/620 compliance, EFR/cone/floating roof tanks, stainless steel tanks, floating roof systems, and geodesic dome roofs with turnkey delivery.
• Tank Inspection & Consulting Services API-653 certified in-service and out-of-service tank inspections, STI/SPCC inspections, magnetic flux leakage scans, non-destructive testing, 3D scanning, floating roof seal gap inspections, survey and settlement analysis, and professional engineering consulting services.
• CTS Millwright and Machining Millwright and machining services for industrial rotating and reciprocating equipment including precision alignment, on-site machining, component replacement, forced outage response, and new construction support.

Quantifiable outcome

• Zero recordable incidents achieved by Tank Inspection team for 9+ years since 2015
• +4 more outcomes

Named customers3 records

Segments10 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Scale indicators11 records

Recent moves5 records

Expansion highlights5 records

Direct peers

• Performance Contractors: Performance Contractors is one of the largest privately held industrial contractors in North America, providing turnaround, construction, and maintenance services to refineries, petrochemical plants, and other heavy industrial clients. Directly comparable to InServ in scope, customer base, and project-based delivery model.
• TEAM Inc. TEAM provides specialty industrial services including inspection, heat treating, leak repair, and field machining to the refining, petrochemical, and power industries. Overlaps with InServ's tank inspection, millwright, and field machining capabilities and shares the same enterprise customer base.
• Matrix Service Company: Matrix Service Company is a North American contractor serving the energy, power, and industrial markets with construction, repair, and maintenance services, particularly for storage terminals and refining infrastructure. Directly comparable to InServ's tank services and refining construction divisions.
• Turner Industries Group: Turner Industries provides industrial construction, maintenance, turnaround, and staffing services primarily to Gulf Coast refining, petrochemical, and energy customers. Closely comparable to InServ's integrated multi-division services model and customer vertical mix.
• Mistras Group: Mistras Group provides non-destructive testing, inspection, and asset protection services primarily to oil & gas, power, and process industries. Closely comparable to InServ's Tank Inspection & Consulting Services division, with similar API-653 inspection and NDE service offerings.
• Brand Industrial Services: BrandSafway (formerly Brand Industrial Services) provides industrial services including scaffolding, insulation, coatings, and specialty access solutions across refineries, petrochemical plants, and power facilities. Overlaps significantly with InServ's Scaffolding & Insulation division and shared customer verticals.

Broad incumbents

• EMCOR Group: EMCOR Group is a large publicly traded provider of mechanical and electrical construction, industrial and energy services, and building services across commercial, industrial, and utility markets. A broader incumbent that overlaps with InServ's mechanical, electrical, and industrial services portfolio.
• Babcock & Wilcox: Babcock & Wilcox provides energy and environmental technologies and services, including boiler and heater design, construction, and aftermarket services for power and industrial customers. Overlaps with InServ's GST heater services division and serves adjacent refining and power customers.
• KBR Inc. KBR is a global engineering, procurement, construction, and services firm serving the hydrocarbons, energy, and government sectors. A broad incumbent EPC competitor that competes with InServ for larger refining and petrochemical project scopes and turnaround work.
• Zachry Group: Zachry Group is a privately held engineering and construction firm serving the power, refining, chemical, and industrial markets with EPC, maintenance, and turnaround services. A larger incumbent competing for the same refinery and petrochemical turnaround and EPC work as InServ.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

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Revenue estimate

Valuation estimate

Number of profiles

Subsidiaries9 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 Inserv