- American Engineering Testing: American Engineering Testing provides engineering and testing services from project design through delivery and asset preservation.
- CTLGroup: CTLGroup is a multidisciplinary engineering, architecture, and materials science firm offering consulting, laboratory testing, and technical investigations.
- ECS Group of Companies: ECS provides geotechnical, construction materials, environmental, and facilities engineering services.
- Gilson Company: Gilson supplies construction materials testing equipment for laboratory and field applications involving soil, aggregate, asphalt, and concrete.
- Hillis-Carnes Engineering Associates: Hillis-Carnes provides geotechnical and geostructural engineering, environmental consulting, specialty construction, materials engineering and testing, and third-party inspections.
- Humboldt Mfg.: Humboldt manufactures and sells construction materials testing equipment for soil, aggregate, concrete, cement, and asphalt.
- Intertek: Intertek provides assurance, testing, inspection and certification services.
- S.W. Cole: S.W.
- Terracon: Terracon provides consulting and engineering services across environmental, facilities, geotechnical and materials disciplines.
- Troxler Electronic Laboratories: Troxler produces construction testing equipment for geotechnical and road construction work.
How to choose
Start with the work your firm actually does. A small civil practice that sends out occasional soil samples may need a dependable local lab and clear reporting. A larger firm managing several projects at once may need pickup coordination, consistent turnaround commitments, and a portal that keeps results organized by project. Ask vendors to describe how they handle your typical sample volume and urgent requests.
Read the contract for details that affect field work. Check sample handling rules, chain-of-custody requirements, retest procedures, report corrections, and notice periods for cancellation. Confirm what happens when a result is delayed or a sample arrives damaged. Get responsibilities in writing.
Check fit with your current tools before signing. Ask whether reports can be exported in formats your staff already use, and whether project names, sample IDs, and locations carry through accurately. A polished portal is less useful if staff must retype results into spreadsheets or project records.
Plan for training time. Find out who will train field staff, how new employees get onboarded, and whether the lab provides short written instructions for sampling, labeling, and shipping. Ask to see a sample report and walk through it with the people who will use it. Small gaps in procedure can lead to rejected samples.
Verify qualifications for the work and location. Where state or agency approval applies, confirm the lab's current status for the specific test methods you need. Ask for references from civil firms similar in size and project mix, then ask those references about communication, corrected reports, and how the lab handled a problem.
- Which tests and sample volumes do you handle routinely for firms like ours?
- What contract terms cover delays, retests, damaged samples, and cancellation?
- How will results transfer into our existing project and document tools?
- What training do field staff need, and how much support is included?
- Can you provide similar-firm references and proof of applicable state approvals?
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