Category 05 · 100 supplier records
Find data center construction companies for new facilities, fit-outs and live-site upgrades. Compare the construction, design, MEP delivery and commissioning responsibilities separately before building a shortlist.
Latest supplier evidence 2 October 2026
Choose the buying scope
Use these package boundaries to decide what belongs in your shortlist and what evidence to request.
Separate cold-shell construction, complete facilities, tenant fit-outs, expansion and occupied-site work.
Request comparable project references, the construction boundary, procurement responsibilities, site logistics and an integrated programme.
Architects, MEP engineers and technical advisers can define or review the design without taking the construction contract.
Confirm design responsibility, deliverables, interface ownership, construction administration and the review process.
Compare mechanical, electrical and plumbing packages, offsite manufacture, installation and testing scope.
Define power and cooling interfaces, subcontract boundaries, equipment procurement, factory tests and installation acceptance.
Commissioning planning, contractor test support and an independent acceptance role are distinct appointments.
Name the commissioning authority, test levels, witnesses, independence requirements, defect process and handover evidence.
Published scope · Unclaimed records
These examples illustrate different published offerings; they are not a ranking or a complete shortlist. A company may cover several packages. Explore every category record below or use the directory filters.
Design, Build & Commissioning covers mEP design, specialist construction, offsite delivery, testing and integrated systems commissioning. The directory lists 100 supplier records in this category, including Freedom, NG Bailey, Sudlows and Exyte. Launch-market assignments are United States (78) and United Kingdom (22). Marketed coverage labels include United States, United States nationwide, United Kingdom and United States and global delivery. Listed records map to the Site & Plan, Connect & Power, Design & Build, Fit Out & Commission, Operate & Maintain and Upgrade & Exit project stages.
Launch-market assignments help you discover suppliers. They do not establish a delivery territory, current capacity or project fit. Published coverage and specifications need confirmation for your project.
US launch-market comparison
| Supplier & comparison focus | Selected published scope | Coverage & evidence |
|---|---|---|
| DPR ConstructionUnclaimedConstruction companies & general contractorsRFQ questions |
| United States & international Record checked |
| HITT ContractingUnclaimedConstruction companies & general contractorsRFQ questions |
| United States Record checked |
| CorganUnclaimedArchitecture & engineering designRFQ questions |
| United States & global Record checked |
| RosendinUnclaimedMEP & electrical contractorsRFQ questions |
| United States & North America Record checked |
| CAIUnclaimedData center commissioning companiesRFQ questions |
| United States and international offices Record checked |
UK launch-market comparison
| Supplier & comparison focus | Selected published scope | Coverage & evidence |
|---|---|---|
| Mace GroupUnclaimedConstruction companies & general contractorsRFQ questions |
| United Kingdom Record checked |
| JCA EngineeringUnclaimedConstruction companies & general contractorsRFQ questions |
| United Kingdom Record checked |
| CundallUnclaimedArchitecture & engineering designRFQ questions |
| United Kingdom and global delivery Record checked |
| NG BaileyUnclaimedMEP & electrical contractorsRFQ questions |
| UK-wide Record checked |
| SudlowsUnclaimedData center commissioning companiesRFQ questions |
| UK & Ireland Record checked |
From the directory records
Start with the site, delivery model and contract boundary. Compare relevant published projects, design and MEP responsibilities, long-lead procurement, live-site controls, programme assumptions and handover requirements. Ask each company to confirm its current delivery team and project-specific availability.
Confirm it explicitly. Construction or installation testing, commissioning management and independent acceptance can sit with different parties. Set out who plans and performs each test, who witnesses it, who resolves defects and who accepts the final handover.
The directory currently lists 100 unclaimed supplier records in Design, Build & Commissioning.
The directory lists 78 supplier records for Design, Build & Commissioning with a United States launch-market assignment, including Rosendin, Corgan, DPR Construction and HITT Contracting. Coverage is supplier-published and should be confirmed directly.
The directory lists 22 supplier records for Design, Build & Commissioning with a United Kingdom launch-market assignment, including Freedom, NG Bailey, Sudlows and Exyte. Coverage is supplier-published and should be confirmed directly.
Supplier discovery · Unclaimed records
NG Bailey electricity-infrastructure business delivering connections, private networks and HV/EHV engineering.
Integrated engineering, offsite manufacture, commissioning and lifecycle services.
Data-centre design, build, technical fit-out and critical infrastructure services.
Engineering and delivery of advanced-technology and data-centre facilities.
European construction and specialist engineering contractor active in data centres.
Multidisciplinary engineering, planning and sustainability advice for complex infrastructure.
Planning, design, engineering and programme services across complex infrastructure.
Electrical design and construction for hyperscale, colocation, enterprise and AI data-centre facilities nationwide.
Architecture and design practice focused on high-performance data-centre campuses and capacity expansion.
Preconstruction, construction and commissioning for data-centre and mission-critical facilities.
Nationwide construction, tenant fit-out, expansion and commissioning services for data centres and mission-critical facilities.
United States construction delivery for data-centre and digital-infrastructure projects.
Electrical design, installation, construction and commissioning for new, expanded and live data-centre environments.
Nationwide multi-trade data-centre design, construction, power, cooling, fire, connectivity, commissioning and facilities services.
Nationwide United States data-centre site preparation, construction, power-distribution delivery and commissioning.
Data-centre mechanical and electrical contracting, HV/MV design and construction, commissioning and live-environment retrofit from a United Kingdom office network.
United States data-centre site selection, development, design-build, construction, prefabrication and commissioning delivery.
Nationwide mission-critical and data-centre construction, design management and commissioning across the United States.
United Kingdom data-centre planning, design, construction, commissioning, testing and handover delivery.
United Kingdom data-centre design, construction, technical fit-out, maintenance and live-site lifecycle upgrades.
Data-centre and comms-room design, construction, upgrades, expansion, maintenance and project management from a United Kingdom base.
United Kingdom data-centre and server-room planning, M&E design, construction, fit-out and upgrade delivery.
United Kingdom electrical installation, fit-out, testing, commissioning support and handover documentation for data-centre projects.
United States data-centre construction using offsite delivery, advanced cooling, redundant power and security-system coordination.
Data-centre engineering, construction, commissioning, staffing, maintenance and round-the-clock critical-facilities management.
Data-centre power, construction, commissioning, life-safety and round-the-clock operations and maintenance services in the United States.
United States power, grid and data-centre planning, engineering, design, interconnection and project-delivery services.
United States power-infrastructure advisory, engineering, grid study, substation, commissioning and maintenance services.
AI-infrastructure group providing liquid-cooling thermal architecture, modular data-centre systems, development and operational services.
United States data-centre electrical power distribution, systems integration, fibre infrastructure and design-build delivery.
United States data-centre MEPF engineering, construction, modular delivery, commissioning and service for new builds and upgrades.
United States mission-critical construction with early MEP coordination, procurement, phased turnover, QA/QC and commissioning.
United States critical-facilities construction, engineering, supply-chain, offsite-manufacturing and project-delivery services.
North American data-centre automation, controls, monitoring, industrial IT and retrofit engineering.
United Kingdom data-centre site due diligence, multidisciplinary engineering design, construction administration and technical advisory.
United Kingdom data-centre construction, project consultancy, technical design, commissioning and operational training.
United Kingdom data-centre fit-out, connectivity, electronic-security, bespoke-manufacturing and facilities services.
United States mission-critical design and construction, power-infrastructure delivery and integrated project services for data-centre and AI facilities.
United Kingdom building-services engineering, sustainability, advisory and smart-building consultancy for data-centre and mission-critical projects.
Data-centre building and electrical controls, energy services, commissioning, monitoring and analytics from a United States office network.
United States data-centre utility coordination, resilient-power strategy, high-density cooling and engineering project delivery.
Data-centre installation design, MEP engineering, site supervision and commissioning support with documented London delivery.
Rocky Mountain electrical preconstruction, construction, fabrication, technology systems and maintenance for data centres and other complex facilities.
United Kingdom mission-critical advisory, MEP, project-management, security, sustainability and data-centre engineering.
United Kingdom data-centre engineering, construction, fit-out, design consultancy, live-environment upgrades and maintenance.
United Kingdom data-centre cold-shell construction, constrained-site logistics, offsite manufacture and design coordination.
United States electrical and mechanical commissioning, power-system testing, grounding engineering and facility support for data centres and mission-critical sites.
Nationwide United States data-centre consulting, design-build, preventive maintenance and facility-infrastructure support.
United Kingdom data-centre cooling consultancy, assessment, design, project management, retrofit delivery, testing and handover.
Embedded project management, scheduling, project controls, safety leadership and commissioning support for United States hyperscale data-centre programmes.
Data-centre commissioning from planning and design review through factory testing, systems integration, handover and operational readiness.
Data-centre commissioning, strategic planning, delivery acceleration, owner representation and operational handover in the United States and EMEA.
United States data-centre design-build, air-conditioning, UPS and power-distribution, generator, fire-suppression and facility-system services.
United States-headquartered data-centre commissioning, scheduling, operational-readiness, asset-management and operational-excellence services.
United States mission-critical electrical construction, power distribution, critical-power systems, commissioning and live-facility maintenance for data centres.
United States data-centre site selection, utility planning, architecture, engineering, procurement and construction.
United States mission-critical construction, prefabrication, advanced work packaging and commissioning-process delivery for data centres.
United States management consulting, design coordination and commissioning oversight for data-centre projects.
United States data-centre grid integration, substations, power distribution, electrical fit-out, testing and commissioning.
Nationwide United States data-centre electrical infrastructure, automation, testing, commissioning and lifecycle support.
Houston data-centre bridge power, natural-gas microgrids, commissioning power, monitoring and site support.
United States data-centre planning, architecture, engineering, construction management, commissioning and asset-management services.
United States high-voltage engineering, procurement, construction, testing, commissioning and maintenance through 765 kV.
United States data-centre strategy, engineering, EPC, commissioning, operations and lifecycle-extension services.
United States engineering and EPC delivery for data-centre power supply, interconnects, onsite generation, substations and commissioning.
United States electrical contracting, systems integration, automation, testing and commissioning group serving data centres and other industrial facilities.
Data-centre grid connections, substations, medium-voltage power stability, battery storage, controls and engineering delivery across the United States and Americas.
United States modular microgrids combining distributed generation, battery storage, backup power, controls, installation and field support for critical infrastructure.
Prefabricated data-centre infrastructure and liquid-cooling distribution systems for high-density AI, HPC and hyperscale environments.
Electrical engineering, EPC, commissioning, testing and maintenance for medium- and high-voltage data-centre power infrastructure.
Data-centre cabling, connectivity infrastructure, network optimisation, build-out and lifecycle support across the United States and other markets.
United States high-voltage, electrical-distribution, standby-power, UPS, controls and fire-alarm delivery for data-centre projects.
United States modular MEP, central-plant, air-handling, immersion-cooling and off-site construction products for data centres.
Integrated planning, environmental, civil, structural, MEP and commissioning support for United States data-centre development.
Building-management, electrical-power-monitoring and data-centre control-system engineering, commissioning and lifecycle support.
Mission-critical civil, utility, transmission, substation, energy-storage and commissioning delivery across the United States.
Substation engineering, protection and control, construction support and commissioning for United States data-centre power connections.
High-voltage engineering, construction, design and commissioning for United States data-centre and utility infrastructure.
Data-centre quality assurance, commissioning and testing from a United States technical-services provider.
Electrical, civil and power-systems engineering for United States data-centre utility connections, substations and alternative power strategies.
Electrical testing, maintenance, engineering, repair and commissioning for United States data-centre power systems.
Data-centre electrical startup, acceptance testing, maintenance and emergency support from a Texas operation.
Electrical construction, engineering, prefabrication, BIM coordination and quality control for United States data centres.
United States mission-critical mechanical, electrical, plumbing, technology and commissioning engineering for data centres.
Nationwide mission-critical planning, electrical construction, communications, life-safety and maintenance services for data centres.
Structural engineering, integrated design and project-delivery services for United States data-centre and mission-critical facilities.
United States data-centre consulting across feasibility, design review, construction assurance, commissioning, operations and decommissioning.
Data-centre development, engineering, construction management and commissioning across power, cooling, water and critical infrastructure.
United States data-centre electrical construction spanning utility substations, redundant distribution, backup generation and building systems.
Data-centre and high-performance-computing electrical contracting for power distribution, UPS, switchgear and energy-plant upgrades.
Mission-critical data-centre consulting, engineering design and commissioning from a New Jersey practice.
United States electrical construction for medium-voltage distribution, switchgear, UPS, generators and data-centre facility upgrades.
United States mission-critical electrical contractor for medium-voltage systems, data-centre construction, fit-outs, retrofits and maintenance.
Nationwide United States data-centre electrical delivery from pre-construction and medium-voltage coordination through construction and commissioning.
Nebraska electrical contractor for data-centre power, low-voltage, fibre, security, fire-alarm, emergency-generation and maintenance work.
Multi-state United States electrical contractor for ground-up data-centre systems and daily mission-critical maintenance.
United States data-centre electrical contractor for construction, backup power, cooling, structured cabling, maintenance, upgrades and relocation.
Nationwide United States electrical contractor for data-centre planning, power distribution, installation, expansion, modernisation and facility support.
Employee-owned United States integrated design firm providing data-centre architecture, engineering, planning and commissioning.
United States engineering and commissioning practice for data-centre systems, failure analysis and critical-operations procedures.