Twining, Inc.

What Twining, Inc. does

Twining, Inc. is a privately held, family-owned engineering services firm founded in 1898 in Fresno, California, and currently headquartered in the Long Beach/Los Angeles area. The company provides construction materials testing, geotechnical engineering, and inspection services to public agencies, private developers, healthcare systems, educational institutions, and construction firms across California. Service lines span five categories: Engineering (geotechnical, vibration and geo-instrumentation, concrete engineering and research, forensics), Materials Testing (concrete, asphalt, low-carbon concrete, third-party product testing), Inspections (special inspection, public works, stormwater, balcony bill, QA/QC management), Modular/Industrialized Buildings, and the Concrete Insights specialty suite (petrographic examination, service life modeling, mass concrete thermal control, carbon-neutral concrete support).

The company's technical platform rests on certified laboratories accredited by USACE, Caltrans, DSA, HCAi, LADBS, AASHTO, and IAS, supported by advanced nondestructive evaluation equipment (ground-penetrating radar, impact echo, ultrasound, shear wave tomography) and proprietary capabilities including a nation-first mobile laboratory for Rapid Strength Concrete validation (introduced 1998) and the first West Coast laboratory for steel fiber-reinforced concrete and shotcrete testing. Twining operates an enterprise B2B go-to-market, selling services through RFP/proposal processes with project-based, quote-driven pricing; it deploys 150+ field inspectors across California (80%+ holding multiple certifications) under a 40+ year agreement with the International Union of Operating Engineers (Local 12, expanded to Local 3 in 2020). Cumulative contract milestones cited include $80M+ in energy project services since 2015, $100M+ with California public agencies, $1B+ in California private development, 2,000+ healthcare projects, 75,000+ public works projects, and 10,000+ clients served.

Name

Twining, Inc.

Legal name

Twining Inc.

Website

https://twininginc.com

Company type

Private

Founded year

1898

Operating status

Operating

Headcount range

251–500 employees

Short description

Twining, Inc. is a California-based, family-owned engineering services firm providing construction materials testing, geotechnical engineering, and inspection services to public agencies and private developers across California, founded in 1898.

Ownership category

akta.pro rank

Product category

Construction Materials Testing & Geotechnical Engineering

NAICS

Testing Laboratories and Services (54138), Building Inspection Services (541350)

SIC

Services-Testing Laboratories (8734)

akta.pro industry

PRIMARYBPAHAIAL

Testing, Inspection, Certification & Commissioning (TICx) Technical Services

Business & Public Services/Professional Services (Legal, Accounting, Consulting)/Engineering & Technical Consulting

Keywords

• Construction materials testing
• Geotechnical engineering services
• Special inspection services
• Concrete testing laboratory
• Quality assurance inspection

Headquarters

HQ city

Long Beach

HQ country

United States

HQ region

North America

Offices2 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Professional Engineering Services: Fee-for-service professional services model providing construction material testing, geotechnical engineering, inspection, and quality assurance services to government agencies, private developers, and construction companies across California.
2. Special Inspection Services: Special inspection services covering structural steel, concrete, masonry, roofing, waterproofing, fire stopping, shotcrete, and drilled-in anchors for construction projects.
3. Laboratory Testing Services: Materials testing laboratory services for concrete, asphalt, aggregates, cement, chemical admixtures, and specialized testing including petrographic examination and nondestructive evaluation.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels6 records

Core offering

Twining provides construction materials testing, geotechnical engineering, and special inspection services for public infrastructure and private development projects across California. Its offerings span soil and foundation analysis, concrete and asphalt laboratory testing, structural inspection, nondestructive evaluation, and forensic analysis, supported by certified laboratories and field-deployed inspectors. The firm also delivers specialized services including QA/QC management, balcony safety inspections (CP1481), stormwater compliance, and industrialized (modular) building review.

Product overview

Twining, Inc. is a full-service engineering company providing construction material testing and geotechnical engineering services. The company operates as a multi-disciplinary service organization organized around five core service categories: Engineering (geotechnical engineering, vibration monitoring, concrete engineering, forensics), Materials Testing (laboratories, concrete testing, asphalt testing, third-party product testing, low carbon concrete testing), Inspections (special inspection, public works inspection, stormwater inspection, balcony bill inspections, QA/QC management), Modular (industrialized buildings, quality system auditing), and Concrete Insights (a comprehensive specialty suite including petrographic examination, service life modeling, and support for carbon-neutral concrete solutions). The company has provided over $80 million in energy project services since 2015 and has operated for over 125 years serving California.

Differentiator

Problem solved

Functional benefit

Brands

• Twining Concrete Insights: Specialized concrete-focused division providing material engineering, laboratory testing, building technology consulting, structures and pavement evaluation, and forensic, petrographic, and analytical services. Active for seventy years.
• Twining Apparel

Products and services

• Geotechnical Engineering Engineering services related to the ground, including soil testing, slope stability analysis, and foundation design for the safety of structures and infrastructure.
• Vibration and Geo-Instrumentation Monitoring of vibration and other geotechnical parameters to assess the impact of construction activities and ensure the safety of structures and infrastructure through pre and post-construction surveys.
• Concrete Engineering and Research Developing concrete mixtures to enhance performance and constructability, including laboratory trial batches, mix design optimization, and performance evaluation.
• Forensics Troubleshooting, condition evaluation, and forensic services for concrete structures and pavements, including determination of material-related distress mechanisms and dispute resolution support.
• Special Inspection Non-destructive examination involving different disciplines such as structural steel, masonry, roofing and waterproofing, fire stopping, welding, and concrete inspection.
• Public Works Inspection Planning, monitoring, and auditing services to ensure that public infrastructure projects are completed on time, within budget, and to required standards.
• Stormwater Inspection Environmental compliance services preventing pollution and ensuring construction activities do not harm local water bodies, including site monitoring, erosion control, and discharge sampling.
• Balcony Bill Inspections Inspection services for exterior elevated elements (E3s) including structural integrity assessments and safety audits to comply with CP1481 requirements.
• Quality Assurance Management / Quality Control Management Providing experienced QC Managers to fill skill gaps and workforce needs on publicly funded projects, ensuring projects are built according to plans and specifications.
• Materials Testing Laboratories Full-service construction material testing laboratories providing accurate results and data crucial for selecting the right materials and ensuring the durability of construction projects.
• Concrete Testing Non-destructive testing of concrete to assess quality and condition using concrete petrography and other analytical methods including compressive strength, flexural strength, and modulus of elasticity testing.
• Asphalt Testing Laboratory testing services crucial for the durability and safety of roads and pavements, ensuring they withstand the test of time and provide a smooth, reliable surface.
• Third-Party Product Testing Lab Independent testing and inspection of materials and products to ensure they meet required standards and specifications.
• Low Carbon Concrete Testing Material evaluation and certification services for low-carbon concrete, supporting carbon-neutral concrete and novel cement solutions.
• Industrialized Buildings Review and inspection of modular buildings to improve quality and safety, supporting the growing modular construction industry.
• Quality System Auditing & Listing Auditing and listing of quality management systems for consistency and documentation of compliance with applicable code bodies and standards.
• Concrete Insights Comprehensive suite of specialty services for the concrete-built environment including material engineering, laboratory testing, building technology consulting, structures evaluation, and forensic and petrographic services.

Quantifiable outcome

• $80 million in energy project services since 2015
• +5 more outcomes

Named customers12 records

Segments7 records

Ideal customer profiles6 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature6 records

Partnerships

Eight partnerships are on record, tiered core.

• US Army Corps of EngineerscoreOthersTwining's laboratories are certified, accredited, and/or inspected by the US Army Corps of Engineers for construction materials testing and inspection services.
• CaltranscoreOthersCertified laboratory and inspection services compliant with Caltrans quality assurance requirements for transportation infrastructure projects.
• Division of the State Architect (DSA)coreOthersQualified provider of inspection and testing services for DSA-regulated educational facility construction projects in California.
• Department of Health Care Access and Information (HCAi)coreOthersApproved inspection and engineering services provider for healthcare facility construction meeting HCAi requirements.
• International Union of Operating Engineers, Local 12coreStrategic or Co-development PartnerOver 40-year agreement with the union; partnership expanded statewide in 2020 to include Local 3. Twining is a signatory employer providing prevailing wage employment to inspectors and technicians.
• AASHTOcoreOthersLaboratory accreditation and testing services compliant with American Association of State Highway and Transportation Officials standards.
• LADBS (Los Angeles Department of Building and Safety)coreOthersAccredited inspection and testing services for Los Angeles city construction projects requiring LADBS oversight.
• IAS (International Accreditation Service)coreOthersInspection agency accreditation for special inspection services and materials testing laboratories.

Scale indicators8 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• Kleinfelder: National engineering, construction materials testing, and geotechnical firm with a strong California presence offering virtually the same service mix (geotechnical, materials testing, special inspection) and competing directly with Twining on public agency and private developer RFPs.
• Terracon: One of the largest U.S. TICx and geotechnical engineering consultancies, providing materials testing, special inspection, environmental, and facilities services comparable to Twining's offerings across multiple end markets including transportation and public infrastructure.
• RMA Group: California-based geotechnical engineering and construction materials testing firm headquartered in Southern California, directly competing with Twining in the state's TICx market for public works, transportation, healthcare, and private development projects.
• NV5 Global: Public technical engineering and consulting firm with infrastructure, environmental, and TICx capabilities; competes with Twining in California materials testing, special inspection, and geotechnical work, and has expanded via M&A to broaden geographic scope.
• CTI Consultants (an Atlas company): Specialty TICx consulting firm focused on construction materials testing and special inspections in California, providing near-identical services to Twining for public agency and private developer clients across the state.

Regional players

• Earth Systems Pacific: California- and West Coast-focused geotechnical engineering and materials testing firm offering similar geotechnical and construction testing services to Twining, competing primarily within the same regional construction market.

Broad incumbents

• AECOM: Global engineering and infrastructure services firm with a large construction services practice that includes materials testing, special inspection, and geotechnical engineering, competing with Twining for major California public and private construction projects.
• WSP: Global professional services firm with a sizable Earth & Environment and property & buildings practice offering geotechnical and construction materials testing services, overlapping with Twining in California transportation, healthcare, and education verticals.
• Tetra Tech: Global consulting and engineering firm whose water, environment, and infrastructure practices include construction materials testing and geotechnical capabilities, comparable to Twining's public works, energy, and infrastructure work in California.
• Stantec: Global engineering firm with environmental services, geotechnical, and construction support offerings that overlap with Twining's geotechnical, materials testing, and inspection services across California infrastructure, water, and building projects.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/twininginc
• YouTubeyoutube.com/@twininginc.694
• Facebookfacebook.com/twining-inc-340618651266
• LinkedInlinkedin.com/company/twining-inc-
• Instagraminstagram.com/twininginc

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 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 Twining, Inc.