Engineering & Construction

Civil, Mechanical, Electrical & Instrumentation Construction & Maintenance Services

Multi-discipline construction and maintenance across civil, mechanical, electrical and E&I works.

We execute construction and maintenance work across all four core engineering disciplines under a single contract. Civil, mechanical, electrical and instrumentation teams work to one programme, one quality system and one safety standard — removing the interface risk that comes with splitting a scope between multiple contractors.

Scope of Work

Civil and structural works: foundations, concrete, steel structures and finishing
Mechanical erection: piping, static and rotating equipment, tanks and vessels
Electrical installation: substations, switchgear, cable routing and terminations
Instrumentation and control: field instruments, control loops, calibration and loop checking
Preventive and corrective maintenance programmes
Pre-commissioning, commissioning and handover support

What is Civil, Mechanical, Electrical & Instrumentation Construction & Maintenance Services?

Multi-discipline construction and maintenance is the delivery of civil, mechanical, electrical and instrumentation (E&I) work packages under a single contract and a single programme. Rather than appointing a separate contractor for each engineering discipline, the client appoints one party that is accountable for the interfaces between them — foundations that must accept a skid, cable routing that must reach a field instrument, and the loop checks that prove the two were built to the same drawing revision.

Why it matters

Most cost and schedule overruns on industrial projects are not created inside a discipline — they are created between disciplines. A civil contractor pours a plinth to a superseded drawing, the mechanical contractor cannot set the pump, and the electrical contractor demobilises while waiting. Each party is individually compliant and the project is still late. Consolidating the disciplines moves that interface risk from the client's risk register onto the contractor's, where it can actually be managed by a single planning function.

Who needs this service?

Operators of petrochemical, refining and gas processing plants carrying out expansions or sustaining capital work
EPC contractors subcontracting discipline packages on a larger project
Utilities, desalination and power generation asset owners
Manufacturing plants adding production lines or replacing end-of-life equipment
Government and semi-government entities delivering infrastructure under Etimad tenders
Facility owners whose in-house maintenance team cannot cover specialist or peak-load work

When to engage this service

A scope spans two or more engineering disciplines and the interfaces are on the critical path
An existing multi-contractor arrangement is producing interface disputes or standing time claims
A plant expansion must be tied into live systems with limited shutdown windows
Equipment is being replaced and the civil, mechanical and E&I works must complete in one outage
In-house maintenance capacity is exceeded by a planned campaign or an unplanned failure
A project requires documented QA/QC records and an as-built handover dossier for regulatory acceptance

Industries served

Oil, Gas & Petrochemicals
Tie-ins to live process systems, hazardous-area electrical installation and instrument loops that must be proven before start-up.
Power & Water
Substation works, switchgear installation, pump and pipework erection across generation, transmission and desalination assets.
Manufacturing & Industrial Plants
Production line installation, utility connections and the civil works that support new or relocated equipment.
Infrastructure & Public Works
Structural, mechanical and electrical packages on facilities delivered for government and municipal clients.
Healthcare Facilities
Medical gas pipework, essential power systems and the controlled fit-out that clinical accreditation depends on.
Commercial & Mixed-Use
MEP installation and structural finishing where handover dates are tied to tenancy commitments.

How the work is delivered

Step 1: Scope review and constructability check

Before pricing is fixed, the drawings and specifications are reviewed discipline by discipline to find the clashes, missing interfaces and access constraints that would otherwise surface during execution. Queries are raised as a technical query (TQ) register so that answers are documented rather than agreed verbally on site.

Step 2: Method statements and risk assessment

Each work package receives a method statement and a task-specific risk assessment before mobilisation. Lifting, confined space entry, hot work, work at height and electrical isolation are identified at this stage and tied to the permit-to-work system the site operates under.

Step 3: Mobilisation and material control

Teams, plant and temporary facilities are mobilised against the agreed programme. Incoming materials are checked against approved submittals, and mill and material test certificates are filed on receipt — not reconstructed at handover, which is where traceability gaps are usually discovered.

Step 4: Discipline execution against an ITP

Work proceeds under an inspection and test plan that defines hold and witness points for each discipline — reinforcement inspection before pour, alignment records before grouting, insulation resistance before energisation. Progress is measured against installed and verified quantities rather than reported percentages.

Step 5: Pre-commissioning and testing

Systems are proven before they are handed over: hydrostatic and pneumatic testing on pipework, flushing and cleanliness verification, cable continuity and insulation testing, instrument calibration and full loop checks from field device to control system.

Step 6: Handover, as-builts and close-out

The handover dossier — test records, calibration certificates, material traceability, punch list closure and as-built drawings — is assembled as work proceeds and issued at completion. Outstanding items are closed against a punch list with an owner and a date, not left as an open list.

Why clients choose this delivery model

One accountable party at the interfaces
When the civil, mechanical and E&I scopes sit with one contractor, a clash between them is a defect to be corrected rather than a claim to be argued. The commercial incentive to resolve it quickly sits with the party able to resolve it.
Directly employed trades
Trades, supervisors and engineers are recruited, trained and mobilised in-house. That makes competency verifiable, keeps the safety culture consistent across disciplines, and avoids the quality variance that comes with layered subcontracting.
Sequencing that reflects real constraints
A single planning function can sequence around shutdown windows, permit availability, crane movements and the summer midday working restriction — rather than three planners each optimising their own package.
Documentation produced as work proceeds
Inspection records, test certificates and as-built markups are raised at the point of work. A dossier assembled during execution can be verified; one assembled afterwards is a reconstruction.
Capacity that scales without re-tendering
Additional trades can be added to an existing scope under the same contract, safety system and quality plan — useful when a discovery during execution enlarges the work.

Single contract versus split discipline packages

Criterion	Split discipline packages	Single accountable contract
Interface responsibility	Sits with the client by default; gaps appear as claims	Contractually owned by one party and managed as a defect
Programme control	Each contractor optimises its own package	One critical path across all disciplines
Safety management	Multiple plans requiring client-led coordination	One site plan, one permit interface, consistent standards
Handover documentation	Assembled from several sources with varying formats	One dossier in one format, compiled during execution
Scope growth during execution	Requires a new appointment or a negotiated variation	Absorbed under the existing contract and safety system

Saudi regulations and compliance

Saudi Building Code (SBC)

The Saudi Building Code is the mandatory technical reference for building and infrastructure work in the Kingdom, issued under the Saudi Building Code National Committee. Structural design and loading (SBC 301), concrete (SBC 304), steel (SBC 306), electrical (SBC 401), mechanical (SBC 501) and fire protection (SBC 801) requirements apply according to occupancy and facility type.

High Commission for Industrial Security (HCIS)

Industrial facilities classified under HCIS are subject to its safety and security directives, which govern matters such as facility layout, fire protection provision, and the security requirements applied to contractors working inside the plant boundary. Work inside these facilities also runs under the operator's own permit-to-work regime.

Municipal permitting and contractor classification

Building permits are issued through the Ministry of Municipal and Rural Affairs and Housing and its Balady platform. Contractors bidding public work require a valid classification certificate in the relevant activity and grade, and government tenders are transacted through the Etimad platform under the Government Tenders and Procurement Law.

Product conformity: SASO and SABER

Regulated products — including much electrical equipment and many construction materials — require conformity assessment against Saudi standards, with certificates issued through the SABER platform. Specifying a compliant product late in a project is a common cause of delay at import or inspection.

Labour, Saudization and heat-stress rules

Workforce arrangements fall under the Saudi Labour Law administered by the Ministry of Human Resources and Social Development, including GOSI registration, Nitaqat Saudization banding, and the prohibition on outdoor work under the sun during the declared midday hours in summer. Programmes that ignore the midday ban lose productive hours that were never in the baseline.

Standards commonly specified

ISO 9001
ISO 14001
ISO 45001
ASME B31.3
ASME Section VIII
ASME Section IX
AWS D1.1
ACI 318
AISC 360
IEC 60364
IEC 60079
IEC 61511
API 570
ASNT SNT-TC-1A

Codes and standards this discipline is routinely held to. The standards applied on any given project are those named in the contract.

Common mistakes to avoid

Splitting disciplines across separate contracts without appointing anyone to own the interfaces between them
Mobilising before the scope is frozen, so early work is executed against drawings that are later superseded
Under-estimating instrumentation loop checking, which is consistently the most compressed activity before start-up
Treating hazardous area classification as an electrical detail rather than a design input that drives equipment selection
Leaving material traceability and test records to be assembled at handover instead of collecting them at the point of work
Building a summer programme that assumes a full working day outdoors, ignoring the declared midday work restriction
Accepting a punch list at handover without an owner and a closure date against each item

Frequently asked questions

What does multi-discipline construction and maintenance actually cover?

It covers civil and structural works, mechanical erection of piping and equipment, electrical installation from substation to final circuit, and instrumentation and control work through to loop checking — delivered as one contract. The defining feature is not the list of trades but the fact that a single party is accountable for how they fit together.

Can you work inside a live plant without a full shutdown?

Yes, where the operator's permit system allows it. Work in live areas runs under isolation certificates, hot work permits and confined space entry controls issued by the facility. The practical constraint is usually permit throughput and simultaneous operations (SIMOPS) restrictions rather than the technical work itself, which is why access is planned alongside the programme rather than after it.

How is quality evidenced rather than asserted?

Through an inspection and test plan agreed before work starts, which sets hold points the client or a third party can witness. The output is a record set — concrete cube results, weld inspection reports, NDT reports, hydrotest packs, insulation resistance readings, calibration certificates and signed loop check sheets — that can be audited against the specification.

Which standards govern welding and pressure work?

Process piping is normally specified to ASME B31.3 and pressure vessels to ASME Section VIII, with welder and procedure qualification to ASME Section IX. Structural steel welding is typically to AWS D1.1. NDT personnel are qualified to a written practice based on ASNT SNT-TC-1A. Client-specific standards — for example an operator's own engineering standards — take precedence where the contract calls for them.

Do you provide the engineering as well as the construction?

Design, detailed engineering and project management consultancy are available as a separate service line and can be combined with construction where the client wants a single point of responsibility from concept through to handover. They can equally be engaged independently, including on projects built by others.

What information is needed to price a scope accurately?

At minimum: drawings and specifications at their current revision, the site and its access constraints, the required completion date or shutdown window, the applicable client standards, and whether the work is inside a live facility. Where drawings are not yet issued for construction, a scope can be priced provisionally and firmed once the design is frozen.

How is safety managed across trades working in the same area?

Through a single site safety plan rather than one per subcontractor. Simultaneous operations are assessed before they are allowed, supervisors hold stop-work authority, and permits are coordinated so that hot work, lifting and confined space entry in the same area are not authorised to run in conflict.

Which regions of Saudi Arabia do you mobilise to?

Work is delivered across the Kingdom, including the industrial concentrations in the Eastern Province, the Riyadh region, the western corridor around Jeddah, Yanbu and the Red Sea developments. Remote sites are handled by mobilising accommodation, transport and welfare provision as part of the scope rather than assuming local availability.

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