- 0Years in Oman
- 0Projects delivered
- 7Locations across Oman
- LEEAFull Member
- ISO 17025Accredited lab
Thirteen service lines, one accountable team.
Bundle calibration, NDT, third-party inspection, pressure-vessel QC, welding QC, electrical testing, 3D scanning, commissioning, HSE services, scaffolding, lifting-operations management, reliability engineering and HSE training under one accountable team.
Calibration
ISO 17025-aligned calibration across pressure, temperature, mass, dimensional, electrical, flow, sound, vibration & gas detection.
Explore /02NDT
UT, PAUT, TOFD, MPI, DPT, RT & ECT for welds, lifting gear and pressure equipment.
Explore /03Third-Party Inspection
Independent inspection of mobile, tower & JIB cranes, lifting accessories, MEWP, forklifts and earthmoving equipment.
Explore /04Vessel & Tank Inspection
API 510 vessels, API 653 storage tanks, API 570 piping, boilers & heat exchangers.
Explore /05Welding & Coating QC
Qualified welding inspection (CWI competence), accredited coating QC, WPS / PQR review, hold-point witnessing.
Explore /06Safety Training
Accredited HSE: scaffolding, work at height, confined space, H2S, first aid, MEWP & equipment operator courses.
Explore /07Electrical Testing
Earthing & lightning protection per IEC 62305, switchgear functional tests, insulation resistance, polarisation index and HV testing.
Explore /083D Scanning & Digital Twin
Terrestrial laser scanning of plants and offshore modules. As-built drawings, point clouds and navigable digital twins for retrofit and MOC.
Explore /09Pre-Commissioning & Commissioning
Independent witnessing of hydrotest, flushing, reinstatement and system turnover for EPC projects. Punch lists, MC and RFSU sign-off.
Explore /10HSE Services
HSE management, consultancy, safety supervision, risk assessment, PTW management, emergency response and fire safety. OPAL / OSHA / ISO 45001 aligned.
Explore /11Scaffolding Services
Engineered scaffold design, erection supervision, inspection programmes and scaffold inspector training. TG20, SG4, ASSE A10.8 and OSHA 1926 compliant.
Explore /12Lifting Operations Management
BS 7121 lift plans, Appointed Person, Lift Supervisor and Slinger-Signaller cover. LOLER governance audits and engineered rigging for critical lifts.
Explore /13Reliability Engineering
HRSG assessment, RAM studies, RCFA, thermal-hydraulic engineering, steam quality, predictive maintenance and asset integrity for power and EOR steam plants.
ExploreWhere GCS work shows up across Oman.
From refineries on the Batinah coast to oilfields in the Empty Quarter, our certificates back up critical infrastructure across nine industries.
Oil & Gas
Upstream, midstream, refining and petrochemicals for PDO, OQ, Daleel, BP and EPCs.
Construction
Civil contractors, infrastructure, high-rise and industrial fit-out across Muscat and the Sultanate.
Logistics & Ports
Sohar, Salalah and Duqm ports plus warehousing, terminals and free-zone tenants.
Power & Utilities
Conventional generation, transmission substations and rapidly expanding solar PV projects.
Mining & Minerals
Mineral processing in Ad Dhahirah and Al Wusta, including chrome, gypsum and limestone.
Manufacturing
Fabrication shops, food and beverage plants, plastics, metals and printing.
Marine & Offshore
Vessel surveys, offshore modules and cargo inspection at Sohar and Duqm ports.
Renewables & Hydrogen
Utility-scale solar and the new green-hydrogen pipeline at Duqm, Salalah and beyond.
Public & Defence
Municipal projects, airports, defence infrastructure and government facilities.
Accuracy you can audit. Safety you can trust.
From oilfield instrumentation to high-rise scaffolds, our certified team protects what matters — your assets, your compliance and your people.
- ISO 17025-aligned calibration with full traceability
- Certified NDT technicians (Level II / III) · ASNT-aligned
- API 510 / 653 / 570 inspectors on staff
- Independent third-party verification recognised by EPC majors
- HSE training aligned with Omani & international standards
- Two offices — Muscat HQ + Duqm branch
Accreditations you can audit.
GCS holds the international accreditations and memberships your procurement, HSE and quality teams require — all auditable, all current.
LEEA Full Member
Lifting Equipment Engineers Association
Quality Management
ISO 9001:2015
Environmental
ISO 14001:2015
Occupational H&S
ISO 45001:2018
Inspection Body
ISO/IEC 17020
Testing & Calibration
ISO/IEC 17025
Seven locations across the Sultanate of Oman.
From Muscat to Salalah, Sohar to Sur — our crews mobilise from the location closest to your site.
Four steps from enquiry to certificate.
Discover
We review your scope, equipment list and applicable codes (ISO, API, ASME, LOLER).
Quote
You receive a clear, itemised proposal — no hidden fees, no vague line items.
Execute
Our certified technicians perform calibration, NDT or inspection on site or in lab.
Certify
Traceable certificates & full reports issued within 5 working days.