What Inspection And Consultancy Services does

Inspection And Consultancy Services (IACS Ltd) is a UK-headquartered (Westerham) privately-held, family-owned inspection and consultancy firm specialising in non-destructive testing (NDT), quality assurance/quality control, and project management services for the global oil, gas, petrochemical, and energy pipeline industries. Founded in 1998 by John Hewitt and now led by his son Ross Hewitt (CEO) and daughter Laura Hewitt (Director), the company operates with a head office team of 10 supplemented by a large global network of CSWIP and PCN Level 2/3 qualified inspectors and specialist contractors active across 50+ countries.

IACS's core technical offering comprises ten NDT methods including Phased Array Ultrasonic Testing (PAUT, delivered for 15+ years), Time of Flight Diffraction (TOFD), Automated Ultrasonic Testing (AUT, DNV-approved), Magnetic Particle Inspection, Dye Penetrant Inspection, Manual Ultrasonic Testing, Hardness Testing, Holiday Detection, and Independent Auditing Services, supported by a proprietary NDT Data Management Review System that enables encrypted remote auditing with real-time client visibility. Adjacent services cover consultancy (corrosion engineering, welding technology), QA/QC, vendor inspection and expediting (across Europe, Middle East, Far East, USA), maintenance inspection, and project personnel provision. In 2023 the company launched IACS Training & Education (IACS T&E), a wholly-owned subsidiary that delivers accredited training and the UK's first 'Practitioner in Pipelines for Hydrogen and Utilities' Apprenticeship, developed with Hopwood Hall College, TWI, and Hydrogen Safe (the latter acquired outright in July 2025).

The business model is professional services under multi-year enterprise framework agreements with major UK gas distribution network operators (Cadent Gas, National Grid, SGN, Northern Gas Networks, Wales & West Utilities) and construction firms (J Murphy & Sons), supplemented by project-based international vendor inspection and training delivery. Six core framework agreements, ISO 9001/14001/45001 certifications, and Achilles Category B2 accreditation at 100% across all measures form the commercial backbone. Pricing is not publicly disclosed and is negotiated on a quote-based, project-scoped basis.

Name

Inspection And Consultancy Services

Legal name

IACS Ltd

Website

https://iacsltd.co.uk

Company type

Private

Founded year

1998

Operating status

Operating

Headcount range

101–250 employees

Short description

UK-based, family-owned inspection and consultancy firm specialising in non-destructive testing (PAUT, TOFD, AUT), quality assurance, and project management for the global oil, gas, and energy pipeline industries, serving major UK gas utilities under framework agreements.

Ownership category

akta.pro rank

Product category

Pipeline Inspection and Non-Destructive Testing Services

NAICS

Testing Laboratories and Services (541380), Testing Laboratories and Services (54138)

SIC

Services-Testing Laboratories (8734)

akta.pro primary industry

Non-Destructive Testing (NDT) & Advanced Inspection (Phased Array, TOFD, Guided Wave) (EUAEAKAF)

akta.pro secondary industries

Third-Party Certification, Code Compliance & Regulatory Inspection (ASME/API/ISO) (EUAEAHAN), Non-Destructive Testing (NDT) & Inspection Services (IMAIACAI), NDT/NDE Inspection Equipment (Ultrasonic, eddy current, radiography, thermography) (IMAGAFAI)

Keywords

• Non-destructive testing
• Pipeline inspection services
• Welding inspection
• Quality assurance consulting
• Vendor inspection expediting

Headquarters

HQ city

Westerham

HQ country

United Kingdom

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Inspection and NDT Services: IACS provides NDT inspection services including Phased Array, MPI, MUT, TOFD, AUT, DPI, Hardness Testing, and Holiday Detection. These are billed as professional services, typically as part of project-based or framework agreements with major utility and energy clients. Services are delivered by qualified CSWIP and PCN Level 2/3 personnel.
2. Quality Assurance and Quality Control Services: QA/QC services encompassing construction progress auditing, vendor integrity inspection, process and system audits, vendor appraisals, and supplier evaluations. Provided as part of ongoing client engagements and framework agreements with major gas networks and utilities.
3. Vendor Inspection and Expediting: IACS's network of Inspection Surveyors, Inspection Engineers, Vendor Inspectors and Expeditors undertake quality inspection and testing at vendor premises during manufacture of mechanical and electrical equipment. Services span Europe, Middle East, Far East and USA.
4. Training and Education Services: IACS T&E provides accredited training across Energy & Utility Skills Register (EUSR) disciplines including CSWIP and BGAS inspection qualifications. Training is delivered at a purpose-built training centre. The company also runs a pioneering apprenticeship programme.
5. Project Management and Personnel Provision: IACS provides project support personnel including Specialist Consultants, Project Managers, Supervisors, Engineers, Quantity Surveyors, Safety Personnel, Document Controllers, and Agricultural Liaison Officers for short-term and long-term assignments. The company builds the biggest pool of industry resources in the UK.
6. Consultancy Services: Engineering, technical, and project management consultancy services from initial planning through to front-end design, field project management, testing and auditing. Includes pipeline inspection, quality assurance, welding technology, and corrosion engineering.

Pricing tiers

Go-to-market motion2 records

Distribution channels3 records

Marketing channels6 records

Core offering

IACS (Inspection and Consultancy Services) provides specialist non-destructive testing (NDT) inspection, quality assurance and control, welding inspection, vendor inspection and expediting, project management, and consultancy services to the gas, oil, petrochemical and energy industries. Services are delivered by CSWIP and PCN qualified personnel on-site at client locations globally, under multi-year framework agreements and project-based engagements, with an in-house training and apprenticeship subsidiary (IACS Training and Education).

Product overview

IACS (Inspection and Consultancy Services) is a leading NDT inspection, consultancy, and expert services provider for the oil, gas, and energy industries. The company operates as a single unified service offering rather than a platform-plus-modules architecture. Its core portfolio centers on Non-Destructive Testing (NDT) services comprising ten distinct testing methods (Phased Array Ultrasonic Testing, Magnetic Particle Inspection, Manual Ultrasonic Testing, Dye Penetrant Inspection, Time of Flight Diffraction, Automated Ultrasonic Testing, Hardness Testing, Holiday Detection, Weld Procedure Qualification, and Independent Auditing Services), complemented by six professional services (Consultancy, Quality Assurance, Quality Control, Vendor Inspection and Expediting, Maintenance Inspection, and Project Services). In 2023, IACS launched IACS Training and Education as a subsidiary dedicated to learning and development, including the pioneering Practitioner in Pipelines for Hydrogen and Utilities Apprenticeship.

Differentiator

Problem solved

Functional benefit

Products and services

• Non-Destructive Testing (NDT) Services Comprehensive NDT examination services using advanced technologies including Phased Array Ultrasonic Testing, Magnetic Particle Inspection, Manual Ultrasonic Testing, Dye Penetrant Inspection, Time of Flight Diffraction, Automated Ultrasonic Testing, Hardness Testing, Holiday Detection, Weld Procedure Qualification and Independent Auditing Services for energy sector clients.
• Consultancy Services Project management services tailored to construction programme size and complexity, covering pipeline inspection, quality assurance, welding technology and corrosion engineering consultancy from initial planning through to front-end design, field project management, testing and auditing.
• Quality Assurance Quality assurance services throughout projects including specialist Quality Managers, Auditors, Quality Representatives and Inspectors ensuring quality management systems implementation across construction and installation projects.
• Quality Control Quality control and surveillance throughout construction and installation including civil, electrical, welding, NDT, coating, agricultural, testing and commissioning operations for pipeline and infrastructure projects.
• Vendor Inspection and Expediting Quality inspection and testing at vendor premises during manufacture of mechanical and electrical plant and equipment including linepipe, valves, heat exchangers, pressure vessels and structural steel across Europe, Middle East, Far East and USA.
• Maintenance Inspection Intelligent condition and predictive monitoring to protect and analyse critical assets including on-stream inspection, corrosion surveys, verification inspections and maintenance monitoring services.
• Training Accredited training across Energy & Utility Skills Register including Health & Safety and technical inspection disciplines such as CSWIP and BGAS inspection qualifications delivered at IACS's purpose-built training centre.
• Project Services Comprehensive project support personnel provision including Specialist Consultants, Project Managers, Supervisors, Engineers, Quantity Surveyors, Safety Personnel, Document Controllers and Agricultural Liaison Officers for short-term and long-term assignments globally.
• Phased Array Ultrasonic Testing (PAUT) Advanced ultrasonic testing using Phased Array systems that volumetrically test materials for defects, weaknesses, cracks and other flaws; IACS has been providing PAUT services for over 15 years with encrypted online result storage.
• Magnetic Particle Inspection Non-destructive testing process for detecting surface or sub-surface discontinuities in ferromagnetic materials, used for inspecting castings, forgings and weldments.
• Manual Ultrasonic Testing (MUT) NDT method using short-wavelength ultrasonic beams to determine thickness, inspect for laminations and detect discontinuities in steel, other metals and alloys using handheld probes with touchscreen devices providing instant results.
• Dye Penetrant Inspection (DPI) NDT process used to detect surface breaking defects in all non-porous materials including metal, plastics and ceramics; effective for detecting hairline cracks, porosity and fatigue cracks.
• Time of Flight Diffraction (TOFD) Advanced ultrasonic testing offering superior weld flaw detection including slag, intergranular stress corrosion cracking and lack of fusion, with capability for in-service inspection at temperatures up to 500°C and accurate sizing of pre-existing or growing discontinuities via pitch-scanning techniques.
• Automated Ultrasonic Testing (AUT) Multi-technology NDT process using mechanised portable scanners with Phased Array and ultrasonic probes, and multi-channel Phased Array and TOFD systems from Design Technologies UK; widely recognised as the most accurate method of detecting and sizing weld flaws in high-production environments. Fully DNV approved.
• Hardness Testing In-situ hardness measuring using Ultrasonic Contact Impedance (UCI) and Rebound Testing methods to identify material characteristics and quality check samples against specifications.
• Holiday Detection Continuity testing applied on protective coatings to determine imperfections and breaks in continuity, detecting the smallest coating flaws using low voltage to check electrical circuit completion.
• Weld Procedure Qualification and Inspection Creation and management of Welding Procedure Specifications (WPS) ensuring welding compliance with maritime or international standards, supervised by Level 3 approved Welding Inspectors with a Welding Procedure Database System for managing current and future welding activities.
• Independent Auditing Services Independent assessment, review, approval and Level 3 NDT consultancy services for all performance, quality and productivity aspects of projects, from pre-contract surveys to final inspections, with the NDT Data Management Review System enabling remote and real-time auditing.
• IACS Training and Education (IACS T&E) Dedicated learning and development subsidiary providing bespoke training programmes, packages and apprenticeships for pipeline inspectors supporting the green agenda and energy sector needs, including the pioneering Practitioner in Pipelines for Hydrogen and Utilities Apprenticeship.

Quantifiable outcome

• First Framework Agreement secured in 1999 with National Grid plc within first year of trading
• +2 more outcomes

Named customers12 records

Segments4 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature6 records

Partnerships

Ten partnerships are on record, tiered core and minor.

• Hopwood Hall College and University CentrecoreStrategic or Co-development Partner · 1 January 2023Hopwood Hall College is a leading apprenticeship provider and strategic partner in the Practitioner in Pipelines for Hydrogen and Utilities Apprenticeship. The college provides world-class facilities within its Advanced Manufacturing & Technology Centre for delivering the apprenticeship curriculum. The partnership also involves TWI and Hydrogen Safe.
• TWI (The Welding Institute)coreStrategic or Co-development Partner · 1 January 2023TWI is one of the world's leading authorities on safety assurance through engineering, materials and joining technologies. TWI is the BGAS-CSWIP certification course tutor responsible for delivering courses and examinations for the Practitioner in Pipelines for Hydrogen and Utilities Apprenticeship. IACS Operations Director Jérôme Marsein also serves as a volunteer at The Welding Institute's London Branch.
• Hydrogen SafecoreStrategic or Co-development Partner · 1 January 2023Hydrogen Safe is the specialist safety training provider responsible for delivering the world's first Ofqual accredited qualification in hydrogen awareness as part of the Practitioner in Pipelines for Hydrogen and Utilities Apprenticeship. This partnership is central to IACS's green energy strategy.
• Cadent Gas LimitedcoreStrategic or Co-development PartnerCadent Gas is one of IACS's current framework agreement holders. IACS provides inspection and consultancy services to Cadent's gas network operations. The partnership is long-standing and central to IACS's UK utility business.
• National Grid plccoreStrategic or Co-development PartnerNational Grid is IACS's first and longest-standing framework agreement partner, having been secured in 1999. IACS has provided continuous services to National Grid since that date across pipeline inspection and quality assurance.
• Scotia Gas Networks (SGN)coreStrategic or Co-development PartnerSGN is a current framework agreement holder for IACS. IACS provides inspection, quality assurance and project management services to support SGN's gas network operations.
• Northern Gas NetworkscoreStrategic or Co-development PartnerNorthern Gas Networks is a framework agreement partner of IACS. IACS provides inspection and quality control services for Northern Gas Networks' gas utility infrastructure projects.
• Wales & West UtilitiescoreStrategic or Co-development PartnerWales & West Utilities is a framework agreement holder for IACS. IACS provides multi-disciplined inspection services for maintenance, inspection and pipeline projects.
• J Murphy & SonscoreStrategic or Co-development PartnerJ Murphy & Sons is a framework agreement holder for IACS. IACS supports Murphy's pipeline construction projects with inspection personnel and quality assurance services.
• SGS (for ISO certification)minorOthersIACS operates Quality and Environmental management systems certified by SGS to ISO 9001 and ISO 14001 standards.

Scale indicators9 records

Recent moves8 records

Expansion highlights5 records

Direct peers

• Rosen Group: Global provider of pipeline inspection, integrity management and NDT services to oil & gas operators. Direct competitor in advanced pipeline integrity, ILI and asset integrity consulting — overlapping heavily with IACS's QA/QC and NDT portfolio.
• Mistras Group: US-headquartered provider of NDT services and integrated inspection solutions with significant oil & gas pipeline inspection exposure. Closest direct competitor in advanced ultrasonic NDT (PAUT, TOFD) and asset integrity for pipelines.
• NDT Global: Specialist in-line pipeline inspection and integrity services using ultrasonic and EMAT technology. Direct comparator for advanced pipeline NDT, particularly for high-resolution crack and metal-loss detection.

Broad incumbents

• Bureau Veritas: Global TIC (Testing, Inspection, Certification) platform with extensive oil & gas and pipeline inspection services. Operates broadly across many industries and geographies, overlapping with IACS in NDT and asset integrity for energy infrastructure.
• SGS: World-leading testing, inspection and certification company with major oil & gas inspection operations and the certifier of IACS's ISO 9001/14001 systems. Provides overlapping NDT, vendor inspection and pipeline integrity services globally.
• Intertek: Global TIC and quality assurance provider with extensive energy sector inspection operations including pipeline and asset integrity services. Direct comparator for QA/QC and vendor inspection work IACS performs.
• Element Materials Testing: Global testing and inspection platform serving energy, aerospace and industrials with NDT, materials testing and asset integrity services. Comparable in welding inspection, materials qualification and QA/QC work for pipeline and energy clients.
• TÜV SÜD: Global technical service organisation offering industrial inspection, NDT and certification services to oil & gas and pipeline clients. Overlaps with IACS in advanced NDT methods, welding qualification and energy infrastructure compliance.
• Applus+: International testing, inspection and certification group with strong energy division (Applus+ IDIADA, Applus+ RTD). Competes with IACS in pipeline NDT, welding inspection and energy asset integrity across multiple geographies.

Regional players

• Force Technology: Danheadquartered inspection, NDT and asset integrity provider with strong European energy sector presence and hydrogen/renewables expertise. Comparable in advanced NDT methods and energy infrastructure certification, primarily competing in Europe.

Market position

Strengths2 records

Weaknesses4 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/IACSnews
• LinkedInlinkedin.com/company/inspection-and-consultancy-services-limited

Compliance3 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles6 records

Subsidiaries1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A1 record

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Inspection And Consultancy Services