What CTLGroup does

CTLGroup is a privately held multidisciplinary engineering, architecture, and materials science firm headquartered in Mount Prospect, Illinois, with 101-250 employees and additional offices in New York and Doha, Qatar. The company delivers consulting and laboratory testing services to building owners, contractors, design firms, government agencies, and industrial clients across technically demanding structural, materials, and building envelope challenges. Its service portfolio spans building envelope and performance consulting, structural analysis and forensic engineering, concrete and cement-based materials, materials science, fire investigation, vibration monitoring, mass concrete thermal control, historic preservation, parking structure compliance (NYC Local Law 126/FISP), and green buildings/sustainability advisory, supported by an in-house 51,000+ sq ft laboratory accredited to ISO 9001, ISO 17025, AASHTO R-18, USACE, 10 CFR 50 Appendix B, and ASME NQA-1.

The firm's core technical platform is its integrated laboratory and consulting capability, including what it describes as one of the world's largest and most respected microscopy and petrography departments, materials testing for nearly 200 ASTM/AASHTO procedures, specialized UHPC and SCC testing, moisture mitigation product testing under ASTM F3010, and a structural/transportation laboratory. Approximately 30% of staff hold Ph.D. degrees across geology, civil engineering, material science, metallurgy, and chemistry, with institutional experience spanning over 100 years. Documented projects include nuclear containment vessel evaluation for NRC relicensing at Davis-Besse, concrete evaluation at Three Mile Island cooling towers, radioactive concrete core extraction and testing at the Hanford Site, and concrete consolidation evaluation for NASA's Deep Space Station DSS-35 in Canberra, Australia.

CTLGroup generates revenue through professional service engagements with quote-based pricing tied to project scope and complexity, distributed across two streams: consulting services (structural engineering, building envelope, materials science, architecture) and laboratory testing (materials, petrography, specialty testing). Go-to-market is direct enterprise field sales supported by technical publications, ASTM/AASHTO standards committee participation, the FIRST LOOK video series, and an email newsletter. The firm has no disclosed funding events, no parent company, and no public ticker.

Name

CTLGroup

Legal name

CTLGroup

Website

https://ctlgroup.com

Company type

Private

Founded year

1987

Operating status

Operating

Headcount range

101–250 employees

Short description

CTLGroup is a private multidisciplinary engineering, architecture, and materials science firm with 101-250 employees, a 51,000+ sq ft accredited laboratory in Mount Prospect, Illinois, and offices in New York and Qatar. It provides consulting and laboratory testing in structural forensics, concrete materials, petrography, building envelope, and nuclear infrastructure to building owners, government agencies, and industrial clients.

Ownership category

akta.pro rank

Product category

Engineering Consulting Services

NAICS

Architectural, Engineering, and Related Services (5413), Testing Laboratories and Services (541380), Research and Development in the Physical, Engineering, and Life Sciences (54171)

SIC

Services-Engineering Services (8711), Services-Testing Laboratories (8734)

akta.pro primary industry

Civil & Structural Engineering Consulting (BPAHAIAA)

Keywords

• Structural engineering consulting
• Materials science testing
• Building envelope consulting
• Concrete materials testing
• Forensic engineering services

Headquarters

HQ city

Skokie

HQ country

United States

HQ region

North America

Offices4 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Engineering and Architecture Consulting Services: CTLGroup provides multidisciplinary consulting services including structural engineering evaluation, building envelope consulting, materials science, and architecture services. Revenue is generated through professional service engagements with clients including building owners, contractors, design firms, and government agencies.
2. Laboratory Testing and Analysis Services: The company operates an in-house 51,000+ sq ft laboratory providing materials testing services for concrete, aggregates, petrography, and specialized testing. Testing services include standard ASTM/AASHTO procedures and custom-designed specialized tests.

Go-to-market motion1 record

Distribution channels2 records

Marketing channels5 records

Core offering

CTLGroup is a multidisciplinary engineering, architecture, and materials science firm providing professional consulting and laboratory testing services for the construction and built environment sectors. The firm delivers structural engineering evaluation, building envelope consulting, materials science analysis, and forensic investigations, supported by a 51,000+ sq. ft. state-of-the-art in-house materials testing laboratory. Services are scoped per project and delivered to building owners, designers, contractors, government agencies, and energy/nuclear operators across the asset lifecycle.

Product overview

CTLGroup is a multidisciplinary engineering, architecture, and materials science firm offering a comprehensive portfolio of consulting services and laboratory testing capabilities for the construction industry. The company's offerings are organized around four core service pillars: Building Science Consulting (envelope investigations, FISP compliance, green buildings, historic preservation), Structural Engineering and Evaluation (forensic engineering, parking structures, mass concrete), Materials Science and Engineering (sustainable materials, product failure analysis), and Laboratory Testing Services (materials testing, microscopy/petrography, concrete testing, aggregate testing, flooring testing). A 51,000 sq. ft. state-of-the-art laboratory supports all consulting services with comprehensive materials testing capabilities. The company also provides specialized insurance claim investigation and fire investigation services, positioning itself as a one-stop provider that can assemble integrated teams combining consulting and laboratory expertise for technically demanding projects.

Differentiator

Problem solved

Functional benefit

Products and services

• Building Envelope / Building Performance Consulting Consulting services for building enclosure analysis, design, investigation, and remediation including envelope forensics, FISP compliance, air barrier services, and thermal bridging evaluation for building owners, designers, and contractors.
• Concrete and Cement-Based Materials Consulting Expert consulting on concrete mixtures, rheology, workability, constructability, mass concrete thermal control, and sustainable construction materials including coal ash utilization for owners, contractors, and material suppliers.
• Structural Analysis, Engineering and Evaluation Structural engineering analysis, forensic investigations, evaluation of existing structures, and repair design for buildings, parking structures, bridges, and industrial facilities for owners, contractors, and legal stakeholders.
• Materials Science and Engineering Consulting Materials characterization, failure analysis, product development, and compatibility evaluation for construction materials including polymers, coatings, metals, and composites for manufacturers and construction stakeholders.
• Insurance Claim Investigation Services Forensic investigation and expert testimony services for insurance claims related to structural failures, fire damage, and construction defects for insurers, attorneys, and owners.
• Materials Laboratory Testing Comprehensive materials testing including concrete, aggregates, mortar, flooring, paints, coatings, sealers, and metals testing using ASTM, AASHTO, CSA, USACE, and EN procedures across a 51,000+ sq. ft. laboratory.
• Microscopy and Petrography Services Petrographic examination services for concrete, aggregates, mortar, masonry, and building stone using stereo, petrographic, metallographic, and scanning electron microscopes for owners, contractors, and researchers.
• Fire Investigation and Explosion Effects Services Structural evaluation of fire and explosion damage, thermal load assessment, material characterization, and repair recommendations for fire-affected structures for owners, insurers, and legal counsel.
• Mass Concrete and Thermal Control Plans Consulting services for mass concrete construction including thermal modeling, temperature control plan development, and mitigation of thermal cracking for contractors and owners.
• Green Buildings and Sustainability Consulting Sustainable building design consulting including energy code compliance, environmental product declarations, LEED certification support, and low-carbon concrete mixture design for owners and design teams.
• Historic Preservation Services Assessment, documentation, and repair design services for historic and heritage structures including condition assessment, nondestructive testing, and conservation-compatible repair recommendations for preservation societies and government agencies.
• Parking Structure Evaluation and Local Law 126 Services Condition assessment, inspection, and repair services for parking structures including NYC Local Law 126 and Local Law 11 FISP compliance reporting for parking structure owners and operators.
• Moisture Mitigation Product Testing (ASTM F3010) Laboratory testing services for two-component resin-based membrane moisture mitigation systems, including vapor permeance testing (ASTM E96) and pull-off adhesion testing (ASTM D7234) for product manufacturers and flooring installers.
• Vibration Monitoring, Analysis and Mitigation Monitoring and analysis of vibration levels from construction, traffic, and industrial sources; assessment of vibration effects on buildings, structures, and sensitive equipment for owners and contractors.
• Adjacent Construction Risk Management

Quantifiable outcome

• Evaluated over 1,000 parking structures globally with award-winning repair design methodologies
• +2 more outcomes

Named customers7 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

Scale indicators8 records

Recent moves5 records

Expansion highlights4 records

Broad incumbents

• Stantec: Global engineering, architecture, and environmental consulting firm with materials and structural practices serving infrastructure, buildings, and energy clients — overlapping on engineering and materials science, broader portfolio.
• S&ME: Engineering and testing firm with strong construction materials and geotechnical laboratories, serving infrastructure, transportation, and commercial clients across the Southeast U.S. — comparable on materials testing, complementary on geography.
• AECOM: Global infrastructure consulting firm with construction services, materials, and structural engineering capabilities. Comparable on engineering consulting and materials testing, with much broader and more diversified service portfolio.
• ECS Group: National provider of geotechnical, construction materials, and environmental testing services with extensive in-house laboratory capacity — comparable on materials testing, but broader and less specialized in structural forensics.
• Terracon Consultants: Large national engineering consulting firm with deep materials testing and construction materials laboratories. Overlaps with CTLGroup on concrete/aggregate testing, geotechnical, and construction materials work, but operates a much broader portfolio.
• Tetra Tech: Global consulting and engineering firm with broad infrastructure, water, and environmental practices. Overlaps with CTLGroup on structural and materials advisory work for federal and infrastructure clients but at significantly larger scale.
• Braun Intertec: Engineering, testing, and consulting firm offering construction materials testing, geotechnical, and environmental services with regional laboratory network; overlaps with CTLGroup on construction materials and structural testing.

Direct peers

• Simpson Gumpertz & Heger (SGH): Engineering firm specializing in structural, building envelope, and materials/forensics consulting with in-house laboratory and testing capabilities, serving similar owners, contractors, and government clients.
• Wiss, Janney, Elstner Associates (WJE): Northbrook, IL-based engineering firm with a virtually identical profile: structural engineering, materials science, architectural forensics, and an in-house testing laboratory. Closest comparable in business model, client base, and specialty focus.
• Exponent: Scientific and engineering consulting firm combining PhD-level technical experts with laboratory testing to deliver failure analysis, materials evaluation, and expert testimony — directly comparable on forensic and materials science engagements.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/ctlgroup
• Facebookfacebook.com/ctlgroup.experts
• LinkedInlinkedin.com/company/ctlgroup

Compliance5 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 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 CTLGroup