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Gulf Calibration & Safety Inspection Services — company profile.

A single-page overview of GCS Oman: who we are, what we do, where we operate and how to engage us. Print this page to PDF (Ctrl/Cmd + P) for a portable company profile.

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Who we are

Gulf Calibration & Safety Inspection Services LLC (GCS) is an Omani independent calibration, NDT, inspection and HSE training company. Established to give industrial operators an audit-ready alternative to fly-in international labs, we have built two offices and five service hubs across the Sultanate, with technicians, metrologists and inspectors based locally.

We hold ISO/IEC 17025, ISO/IEC 17020, ISO 9001:2015, ISO 14001:2015 and ISO 45001:2018 certifications, and are a LEEA Full Member. Every certificate we issue is traceable, audit-defensible and signed by a competent person on staff.

What we do — thirteen service lines

Calibration

ISO 17025 pressure, temperature, mass, dimensional, torque and gas detector calibration.

NDT

UT, PAUT, TOFD, MPI, DPT, RT, ECT, GWT and tank-floor MFL robotic inspection.

Third-Party Inspection

LEEA-aligned inspection of cranes, lifting gear, MEWPs, forklifts and earthmoving plant.

Vessel & Tank

API 510, 653 and 570 inspection with RBI planning per API 580/581.

Welding & Coating QC

CWI-competent welding inspection and ISO 17020 coating QC.

Electrical Testing

Earthing, lightning protection, switchgear and insulation resistance per IEC and IEEE.

3D Scanning & Digital Twin

Laser scanning of plants, as-built drawings and navigable digital twins.

Commissioning

Hydrotest, flushing, reinstatement and MC/RFSU sign-off support.

HSE Training

35 accredited safety courses across 9 disciplines, bilingual delivery.

Where we operate

Two offices and five service hubs across Oman: Muscat HQ, HQ, plus regional hubs in Sohar, Nizwa, Salalah, Sur and Ibri. Crews mobilise from the closest location, with same-day mobilisation possible inside the Muscat metropolitan area and a 24-hour mobilisation standard everywhere else in the Sultanate.

Headline numbers

4+

Years in Oman

850+

Projects delivered

120+

Industrial clients

98%

On-time delivery

5 days

Certificate turnaround

24 hours

Mobilisation across Oman

Certifications & memberships

ISO/IEC 17025

Testing and calibration laboratory accreditation

ISO/IEC 17020

Inspection body accreditation

ISO 9001:2015

Quality management system

ISO 14001:2015

Environmental management system

ISO 45001:2018

Occupational health & safety management

LEEA Full Member

Lifting Equipment Engineers Association

Industries we serve

Oil & gas (upstream, midstream, refining, petrochemicals) · Construction & infrastructure · Logistics & ports · Power & utilities · Mining & minerals · Manufacturing · Marine & offshore · Renewables & hydrogen · Public sector & defence.