Eckersley O'Callaghan

What Eckersley O'Callaghan does

Eckersley O'Callaghan is a privately held global engineering consultancy founded in 2004 and headquartered in London. The firm specializes in structural and facade engineering, delivering services for complex, high-profile construction and renovation projects worldwide. Its client base spans architects, real estate developers, educational institutions, healthcare providers, luxury retailers, and cultural organizations, with a marquee portfolio that includes Apple retail stores globally, the Zayed Centre for Research at Great Ormond Street Hospital, the twin Shum Yip Towers in Shenzhen, Brookfield's Manhattan West podium, and academic buildings for Oxford colleges.

The company's core offerings include structural engineering (steel, concrete, timber, hybrid systems, and structural glass), facade engineering (curtain walls, glazing systems, rainscreen cladding, facade access and maintenance), civil engineering (foundations, drainage, SUDs), and digital design services supported by BIM tools such as Revit and Rhinoceros. A proprietary differentiator is the EOC ECO2 tool, used internally to track and optimize embodied carbon values through design development. The firm also holds specialized expertise in carbon fibre structures and large-format structural glass installations. The firm operates from legal entities in the UK (Eckersley O'Callaghan Limited), the United States (Eckersley O'Callaghan & Partners LLC), France (Eckersley O'Callaghan SARL), and China (Shanghai Eckersley O'Callaghan Structural Design Consulting Co Ltd), with offices across London, Paris, New York, Los Angeles, Hong Kong, Shanghai, Delhi NCR, and Sydney.

Commercially, Eckersley O'Callaghan operates as a professional services consultancy on a project-based fee model, securing work through design competitions, direct appointments, and repeat client engagements. Pricing is not publicly disclosed and is determined by scope, complexity, and duration of each engagement. The firm has been recognized through industry awards including the 2025 Building Magazine Top 150 Consultants ranking, 2024 Building Innovation Award for Most Innovative SME, 2024 Facade Design and Engineering Award (International New Build), and the 2023 Structural Timber Award Winner of Winners, and projects it has engineered have achieved BREEAM Excellent, BREEAM Outstanding, and LEED Gold certifications.

Name

Eckersley O'Callaghan

Legal name

Eckersley O'Callaghan Ltd

Website

https://eocengineers.com

Company type

Private

Founded year

2004

Operating status

Operating

Headcount range

51–100 employees

Short description

Eckersley O'Callaghan is a London-founded, global engineering consultancy providing structural, facade, and civil engineering services to architects, developers, and institutional clients on complex, award-winning buildings worldwide.

Ownership category

akta.pro rank

Product category

Structural and Facade Engineering Consultancy

NAICS

Architectural, Engineering, and Related Services (5413), Structural Steel and Precast Concrete Contractors (238120)

SIC

Services-Engineering Services (8711)

akta.pro primary industry

Civil & Structural Engineering Consulting (BPAHAIAA)

akta.pro secondary industries

Architectural Glazing & Fenestration (Curtain Wall, Windows, Storefronts, Skylights) (IMAFAMAC), Office & Corporate Building Construction (IMAFACAA)

Keywords

• Structural engineering
• Facade engineering
• Glass structures
• Building information modeling
• Civil engineering services

Headquarters

HQ city

London

HQ country

United Kingdom

HQ region

Europe

Offices8 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Engineering Consultancy Services: Professional engineering services provided to clients on construction and development projects. Revenue is generated through fee-based consultancy contracts for structural engineering, facade engineering, and civil engineering services on specific projects.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels5 records

Core offering

Eckersley O'Callaghan is a global engineering consultancy delivering structural and facade engineering services for complex building projects. The firm designs structural systems in steel, concrete, timber, and structural glass, alongside building envelope solutions including curtain walls, glazing, and rainscreen cladding. It supplements these with civil engineering, digital design (BIM/Revit/Rhino), and facade access & maintenance (FAM) consulting for architects, developers, and institutions worldwide.

Product overview

Eckersley O'Callaghan is a global engineering consultancy offering structural engineering and facade engineering as its primary services, supplemented by civil engineering, digital design capabilities, and facade access & maintenance services. The company works on complex building projects globally, providing engineering for new-build, renovation, and adaptive reuse projects across commercial, residential, cultural, educational, and healthcare sectors. The core offerings include structural design, facade engineering, civil engineering, and specialist glass structures, with digital design tools like BIM and proprietary carbon tracking (EOC ECO2) supporting project delivery.

Differentiator

Problem solved

Functional benefit

Products and services

• Structural Engineering Services
• Facade Engineering Services
• Civil Engineering Services
• Digital Design Services
• Facade Access & Maintenance (FAM) Services
• Specialist Glass and Facade Structures

Quantifiable outcome

• Projects have achieved BREEAM Excellent and Outstanding ratings
• +2 more outcomes

Named customers17 records

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Scale indicators3 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• Arup: Global engineering consultancy with leading structural, facade, and civil engineering practices. Arup is the most established direct competitor to EOC in complex structural and facade engineering, particularly on landmark buildings.
• Buro Happold: International multidisciplinary engineering consultancy with deep structural engineering and facade capabilities. Directly comparable to EOC in delivering complex, design-led building projects for architects and developers.
• Thornton Tomasetti: US-headquartered engineering firm specialising in structural engineering, facade engineering, and applied science. Direct peer in facade access/maintenance, structural glass, and complex facades.
• Werner Sobek: Stuttgart-based structural engineering practice with a strong sustainability and innovation focus. Comparable to EOC in delivering ultra-lightweight, sustainable structural designs on signature buildings.
• Meinhardt Group: Asia-headquartered engineering consultancy with strong facade and structural engineering capabilities. A direct peer in facade engineering, particularly across Asia Pacific, the Middle East, and Australia where EOC also operates.
• Simpson Gumpertz & Heger (SGH): US engineering firm specialising in structural engineering, building envelope, and applied science. Direct peer in facade engineering and structural glass, with comparable project profiles on signature US buildings.

Broad incumbents

• WSP: Global professional services firm with a large engineering practice including structural and facade engineering. Competes with EOC on large multi-disciplinary mandates, but as part of a much broader services portfolio.
• Mott MacDonald: Global engineering, management, and development consultancy with structural and building services capabilities. A broad incumbent that often bundles services on large projects where EOC competes as a specialist.

Emerging players

• Robert Bird Group: Specialist structural and civil engineering consultancy with strong presence in Australia, the Middle East, and the UK. Comparable in its focus on complex structural design and signature building projects, though with less facade focus than EOC.
• Front Inc: Boutique facade engineering consultancy with a focus on complex building envelopes. A niche peer in facade engineering and curtain wall design, competing with EOC for high-end, architecturally ambitious projects.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat4 records

Key risks6 records

Key highlights6 records

Customer concentration

• Xx.com/EOCengineers
• YouTubeyoutube.com/channel/UCCHTQi1q2ZBBvClIbJwggvQ
• LinkedInlinkedin.com/company/eckersley-o'callaghan
• Instagraminstagram.com/eocengineers

Compliance11 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles8 records

Funding overview

Funding rounds

Investors

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

M&A

Investments

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

Frequently asked questions about Eckersley O'Callaghan