I. C. Thomasson Associates, Inc.

What I. C. Thomasson Associates, Inc. does

I. C. Thomasson Associates, Inc. (ICT) is a Nashville-headquartered, employee-owned multidisciplinary engineering consulting firm founded in 1944, delivering integrated mechanical, electrical, controls, plumbing, fire protection, information technology/low-voltage, energy efficiency, and environmental engineering services. Following its recent merger with Salas O'Brien, the firm operates as "I. C. Thomasson Associates, Inc., a Salas O'Brien Company," with affiliate commissioning capability through Thomasson Commissioning Services. ICT serves institutional, governmental, healthcare, aviation, higher education, K-12, manufacturing/industrial, hospitality, justice, and power/utilities clients across the United States and abroad, anchored by multi-decade relationships with the Metro Nashville Airport Authority (BNA Vision), HCA Healthcare, Vanderbilt University, Belmont University, the Federal Bureau of Prisons, NASA, TVA, Nissan, and Mercedes-Benz. Core technology assets include BIM 3D coordination with clash detection, central utility plant and combined heat and power (CHP) design up to 14 MW and 480,000 lb/hr steam capacity, geothermal HVAC systems, Title V air permitting support, and LEED/Green Globes certification expertise — with the first LEED Platinum university building in Tennessee and the first LEED Gold federal penitentiary in the U.S. among its delivered projects.

ICT's revenue is generated primarily through fee-based, project-driven professional service engagements: design commissions from owners, design-build sub-consultant roles to architectural firms (Fentress, Earl Swensson Associates, Gould Turner Group, HKS, Woolpert, etc.), and renewable task-order master contracts (e.g., TVA AE Master Contract, recurring MNAA task orders). Go-to-market is relationship-driven enterprise field sales targeting Fortune 500 owners and government agencies, supplemented by referral-based demand through architectural partners and earned-media credibility from industry rankings (#31 Building Design+Construction Top Airport Facilities 2023) and trade awards (DBIA, AAAE, ACEC, ABC, ULI). Pricing is quote-based and contract-negotiated rather than standardized; project size ranges from multi-million-dollar campus retrofits to $182M federal facilities, with no public rate cards. Customer concentration is anchored by a small set of repeat enterprise and institutional accounts but diversified across more than 150 active engagements and approximately a dozen verticals, implying moderate concentration risk.

Name

I. C. Thomasson Associates, Inc.

Legal name

I.C. Thomasson Associates, Inc.

Website

https://icthomasson.com

Company type

Private

Founded year

1944

Operating status

Operating

Headcount range

101–250 employees

Short description

I. C. Thomasson Associates is a Nashville-based, employee-owned multidisciplinary engineering consulting firm (founded 1944, now a Salas O'Brien Company) delivering MEP, fire protection, IT, and energy engineering for healthcare, aviation, higher education, federal, and industrial clients across the United States.

Ownership category

akta.pro rank

Product category

Engineering Consulting Services

NAICS

Engineering Services (54133), Other Scientific and Technical Consulting Services (54169), Professional, Scientific, and Technical Services (54)

SIC

Services-Engineering, Accounting, Research, Management (8700), Services-Management Consulting Services (8742)

akta.pro primary industry

Telecommunications & Network Engineering Consulting (BPAHAIAH)

akta.pro secondary industry

Enterprise Architecture & Technology Roadmapping (BPAEAAAC)

Keywords

• Mechanical engineering consulting
• Electrical engineering services
• Fire protection engineering
• Building systems design
• HVAC engineering services

Headquarters

HQ city

Nashville

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Engineering Consulting Services (Project-Based Professional Fees): Primary revenue from fee-based engineering consulting engagements (mechanical, electrical, plumbing, fire protection, IT, energy efficiency, environmental, commissioning) delivered as discrete projects for healthcare, commercial, hospitality, recreation, education, institutional, industrial, aviation, justice, government, manufacturing, and power/utilities clients. Work is delivered via master contracts (e.g., TVA AE Master Contract), design-build sub-consultant roles, and direct owner commissions.
2. Commissioning and Energy Services (via Affiliate): Commissioning services are offered through the affiliate Thomasson Commissioning Services, including verification of system performance for LEED certification (e.g., Measurement & Verification at Pearland and Alliance Medical Centers), and broader energy services across commercial, industrial, and healthcare sectors.

Go-to-market motion3 records

Distribution channels5 records

Marketing channels7 records

Core offering

I. C. Thomasson Associates, Inc. (ICT) is a multidisciplinary engineering consulting firm delivering integrated mechanical, electrical, controls, plumbing, fire protection, information technology/low-voltage, energy efficiency, and environmental engineering design services. The firm supports complex, regulated, and mission-critical facilities such as hospitals, airports, federal prisons, central utility plants, university campuses, and manufacturing plants, including affiliated commissioning services delivered through Thomasson Commissioning Services.

Product overview

I. C. Thomasson Associates, Inc. (ICT) is a multidisciplinary engineering consulting firm that delivers integrated building and infrastructure design through a suite of coordinated service lines rather than a single unified software product. Its portfolio comprises eight core service disciplines — Mechanical Engineering, Electrical Engineering, Controls Engineering, Plumbing Engineering, Fire Protection Engineering, Information Technology Engineering, Energy Efficiency Services, and Environmental Services — which are typically delivered together on projects across markets including aviation, healthcare, commercial and office, entertainment, sustainability, education, government, hospitality, justice, manufacturing, multi-family, power and utilities, and residential. ICT operates as an employee-owned company and is a Salas O'Brien Company, with 82 years of history supporting LEED-certified building projects.

Differentiator

Problem solved

Functional benefit

Products and services

• Mechanical Engineering Mechanical engineering consulting services covering HVAC, central utility plants, and related building systems design for commercial, institutional, healthcare, aviation, and industrial facilities.
• Electrical Engineering Electrical engineering consulting for power distribution, lighting, and low-voltage systems in built environments.
• Controls Engineering Controls engineering services for building automation systems (BAS) and integrated control system design for facilities including military installations and healthcare campuses.
• Plumbing Engineering Plumbing system design and consulting for commercial, institutional, and industrial facilities.
• Fire Protection Engineering Fire protection and life safety system design, including suppression, detection, code compliance consulting, and AT/FP standards for federal facilities.
• Information Technology Engineering

Quantifiable outcome

• 20.9% total site-wide improvement in energy performance at Nissan Canton (SEP Platinum certified)
• +7 more outcomes

Named customers17 records

Segments6 records

Ideal customer profiles7 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature12 records

Partnerships

Ten partnerships are on record, tiered flagship - corporate merger, strategic for energy/campus clients, tactical in-house capability, long-term enterprise relationship, recurring architectural partner, recurring aviation partner, hospitality client relationship, government client relationship and industrial design-builder partner.

• Salas O'Brienflagship - corporate mergerStrategic or Co-development PartnerICT and Salas O'Brien announced a merger (referenced on the home page banner: "ICT Merges with Salas O'Brien - Learn More"). As a Salas O'Brien Company, ICT is now an employee-owned multidisciplinary engineering consulting firm operating within Salas O'Brien's national network of building-system engineering affiliates. The merger expands ICT's geographic reach and Salas O'Brien's depth in healthcare, aviation, higher education, government, and manufacturing engineering.
• Siemens (Energy Service Company / ESCO)strategic for energy/campus clientsImplementation/ SI/ Consulting PartnerICT partnered with Siemens on an Energy Performance Contracting (EPC) delivery of the new Central Utility Plant for the University of Florida College of Veterinary Medicine campus. ICT assisted Siemens and UF in major equipment procurement, air emissions permitting, commissioning, and integrating Siemens Demand Flow chilled-water optimization software; the project received Two Green Globes certification.
• Thomasson Commissioning Services (Affiliate)tactical in-house capabilityOEM/ Whitelabel/ Licensing PartnerICT's affiliate Thomasson Commissioning Services provides commissioning services to ICT's commercial market clients and broader customers. The relationship is referenced on the Commercial and Office market page: "Commissioning services may be provided by our affiliate, Thomasson Commissioning Services."
• Nissan North America, Inc.long-term enterprise relationshipStrategic or Co-development PartnerICT designed the complete central utility plant for Nissan's 2,000,000 SF Canton, MS automotive plant and has been engaged in additional Nissan projects (e.g., Nissan Motor Manufacturing Compressed Air and Chilled Water Plant Expansion, Nissan North America Corporate Headquarters). The relationship delivered SEP Platinum certification and 20.9% site-wide energy performance improvement.
• Earl Swensson Associates (Architectural Partner)recurring architectural partnerImplementation/ SI/ Consulting PartnerICT served as the MPE/FP engineer under Earl Swensson Associates on Belmont University's Fisher Center for the Performing Arts (153,000 SF, LEED Certified) and additional projects across Nashville. ESA is a recurring design partner for ICT on healthcare, hospitality, and higher education projects (e.g., The Gaillard Center in Charleston).
• Fentress Architects (Architectural Partner)recurring aviation partnerImplementation/ SI/ Consulting PartnerICT partnered with Fentress Architects as the engineering team on the BNA Concourse D and Terminal Wings Expansion (300,000 SF, LEED v4 Silver, 2021 DBIA Aviation Project of the Year).
• Dream Hotel Grouphospitality client relationshipStrategic or Co-development PartnerICT partnered with Dream Hotel Group on the 169-room Dream Hotel at Printer's Alley in Nashville (140,000 SF historic renovation). The collaboration involved multiple planning discussions about preserving the historic aesthetic of the building while modernizing it as a high-rise hotel.
• Chartwell Hospitalityhospitality client relationshipStrategic or Co-development PartnerICT partnered with Chartwell Hospitality on the Marriott Residence Inn and Hilton Green Hills dual-hotel development (490,000 SF total, 2019 Hilton New Build of the Year). The relationship leveraged ICT's experience with Hilton-branded hotels.
• Mississippi Department of Public Safety; Mississippi Department of Finance & Administration Bureau of Buildingsgovernment client relationshipImplementation/ SI/ Consulting PartnerICT designed mechanical, plumbing, electrical, and fire protection systems for the North Mississippi Regional Laboratory, a Department of Public Safety Crime Lab in Batesville, MS, providing forensic services in Technical Assistance, Latent Print, and Controlled Substance Identification.
• Fagen, Inc.industrial design-builder partnerImplementation/ SI/ Consulting PartnerICT partnered with Fagen, Inc. on the Siouxland Combined Heat and Power System project for Siouxland Ethanol, LLC. ICT provided the CHP plant design (7.5 MW combustion turbine + HRSG + duct burner + Regenerative Thermal Oxidizer); Fagen served as the construction partner.

Scale indicators10 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• Smith Seckman Reid: Nashville-headquartered MEP/FP engineering consulting firm serving healthcare, aviation, higher education, and government clients. The closest direct geographic and service-line peer to ICT, including overlap on healthcare and federal work.
• Affiliated Engineers (AEI): National MEP/FP consulting firm with comparable healthcare, university, and central utility plant practices. Highly comparable service model and project scale to ICT, including CHP and high-performance building design.
• ME Engineers: Boulder-based MEP consulting firm with strong performing arts, sports, and convention center portfolios — directly comparable to ICT's Schermerhorn Symphony, Ascend Amphitheater, and Fisher Center work.
• TLC Engineering Solutions: Florida-based MEP/FP consulting firm with healthcare, education, and government practices. Comparable service-line breadth and federal/healthcare market overlap with ICT.
• BR+A Consulting Engineers: Boston-based MEP/FP firm with healthcare, higher education, science & technology, and civic market focus. Closely comparable in service mix and project types to ICT's healthcare and higher education verticals.
• Page (PageSouthwell): Multi-discipline architecture/engineering firm with strong MEP capabilities in healthcare, higher education, and government. Comparable in offering breadth (MEP plus broader AE services) and client verticals.

Broad incumbents

• Salas O'Brien: ICT's parent company post-merger — a national building-system engineering platform with 50+ offices. Now the dominant channel through which ICT's services are distributed, and a benchmark for ICT's ultimate scale and capability expansion.
• Burns & McDonnell: Large employee-owned engineering, architecture, and construction firm with MEP, federal, aviation, healthcare, and power practices. Comparable on federal/MILCON and aviation work but at significantly larger scale.
• WSP USA: Global engineering consultancy with full MEP/FP and broader building services capabilities. Competes with ICT on healthcare, aviation, and federal projects but as part of a much larger portfolio.
• Stantec: Global engineering and architecture firm with significant healthcare, higher education, aviation, and federal practices. Competes on healthcare and federal design-build pursuits at a much larger scale.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks5 records

Key highlights7 records

Customer concentration

• Xx.com/icthomasson
• YouTubeyoutube.com/channel/UCH83fgQALOVbbKaDHl47ZVQ
• Facebookfacebook.com/icthomasson
• LinkedInlinkedin.com/company/i-c-thomasson-associates-inc-

Revenue estimate

Valuation estimate

Number of profiles

Subsidiaries1 record

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 I. C. Thomasson Associates, Inc.