Ramboll
Danish multinational architecture, engineering, and consulting company.
Last updated August 31, 2026
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Overview
Ramboll is a Danish multinational architecture, engineering, and consulting group headquartered in Copenhagen. Founded in October 1945 as Rambøll & Hannemann by engineers Børge Johannes Rambøll and Johan Georg Hannemann, the firm initially participated in Denmark's post-war reconstruction and developed specialist capabilities in structural engineering, telecommunications infrastructure, broadcasting towers, power systems, and public works. Over time, it broadened into environmental services, buildings, transport, water, energy, architecture, landscape, and management consulting. The company is employee-oriented and foundation-owned. In 1972, ownership was transferred to a foundation controlled for the benefit of the business's long-term independence, employees, clients, and communities. The Ramboll Foundation owns almost all of Ramboll Group A/S, while employees and the company hold the balance. This ownership model is a central part of Ramboll's positioning as a privately held professional-services group rather than a publicly traded engineering contractor. Ramboll expanded beyond Denmark through offices in Norway and other Nordic countries, a 1991 merger with B. Højlund Rasmussen, and its 2003 merger with Scandiaconsult. The latter created the largest consulting engineering firm in the Nordic region at the time and accelerated the transition from a primarily Danish and Nordic practice into an international organization. Subsequent acquisitions added engineering, architecture, environmental science, telecommunications, power, and management-consulting capabilities in the United Kingdom, India, North America, Germany, and other markets. Notable transactions included Whitbybird, Gifford, ENVIRON, OBG, Henning Larsen Architects, civity Management Consultants, K2 Management, and SCC Scientific Consulting Company. Ramboll's business is organized around multidisciplinary markets including Buildings, Transport, Energy, Environment & Health, Water, Management Consulting, and Architecture & Landscape. Its work spans feasibility studies, master planning, engineering design, project and programme management, environmental and social assessment, climate and sustainability advice, digital and technical consulting, and operational support. The firm serves public authorities, infrastructure owners, utilities, energy companies, property developers, industrial companies, and other institutional clients. Its project record includes major Nordic infrastructure such as the Øresund Bridge and Great Belt Bridge, as well as the Royal Danish Opera in Copenhagen. International work has included the Tate Modern extension in London, Ferrari World in Abu Dhabi, the King Abdullah Petroleum Studies and Research Center in Saudi Arabia, the National Museum of Art, Architecture and Design in Oslo, Network Rail programmes in the United Kingdom, and projects in remote environments including Antarctica. Ramboll has also worked on energy-transition, offshore wind, environmental remediation, water, waste, transport, and urban-development assignments. In the twenty-first century, Ramboll has increasingly presented itself as a sustainability-led consultancy. Its service portfolio connects engineering and design with decarbonization, climate adaptation, renewable energy, circular economy, environmental protection, resilient infrastructure, and healthier communities. The company has offices in more than 35 countries and works internationally, with significant activity in Europe and North America. The brand's overall proposition is to combine technical engineering depth with architecture, environmental science, management advice, and long-term sustainability expertise.
History
Ramboll began in Copenhagen in October 1945 as Rambøll & Hannemann, founded by Børge Johannes Rambøll and Johan Georg Hannemann. Both founders had studied at the Technical University of Denmark and established the business during the reconstruction period after the Second World War. One early assignment was the construction of a Ferris wheel for Copenhagen's Tivoli Gardens. The young firm soon developed expertise in lightweight structures, broadcasting, telecommunications, and power infrastructure. In 1950 it designed Denmark's first giant radio-transmission mast, a 142-metre structure that used substantially less steel than competing designs. Contracts to erect broadcasting towers in Denmark and Norway helped establish the company as a specialist engineering practice. During the 1960s, Rambøll & Hannemann expanded from roughly 30 employees at the beginning of the decade to around 170 by its end. It also entered waste management and incineration engineering, beginning the environmental-services development that later became one of the group's defining areas. Its building work included the engineering of the National Hospital in Copenhagen, which opened in 1970. A major governance change occurred in 1972, when ownership was transferred to an employee-controlled foundation. The arrangement was designed to protect independence, reinvest profits, support employees, and secure the firm's long-term development. The company had offices in Copenhagen and Aarhus and opened an Oslo branch in 1976. During the 1980s, Børge Rambøll articulated the Ramboll Philosophy, which became a reference point for the organization's values and working culture. The firm expanded its Nordic platform in the 1990s. Its 1991 merger with B. Højlund Rasmussen broadened the combined company's multidisciplinary offering. The name was later shortened from Rambøll, Hannemann & Højlund to Rambøll. The company also adopted digital methods for a major railway-electrification project covering approximately 350 kilometres of track and about 20,000 steel masts. In 2003, Rambøll merged with Scandiaconsult. The enlarged firm became the Nordic region's largest consulting engineering business at that time, and Danish gradually ceased to be its corporate language as international operations became more important. International growth accelerated after 2003. Ramboll acquired Norwegian firm Storvik & Co. in 2006 and UK engineering firm Whitbybird in 2007. In 2008 it strengthened its Indian telecommunications-design activities through the acquisition of ImIsoft. In 2011, it acquired UK engineering firm Gifford and the power-engineering division of DONG Energy, now Ørsted. Ramboll Informatik was divested to Danish IT company KMD in the same year, reflecting a decision to focus the group on engineering, consulting, and related professional services. The acquisition of ENVIRON in 2014 added a large international community of environmental and health-science specialists and strengthened Ramboll's work in environmental risk, health, climate, and sustainability. In 2018, the purchase of OBG expanded the North American engineering and design platform. The addition of Henning Larsen Architects, announced in 2019 and completed in 2020, deepened the relationship between Ramboll's engineering disciplines and internationally recognized architectural design. Further acquisitions in 2020 and 2021 included Web Structures, while civity Management Consultants, K2 Management, and SCC Scientific Consulting Company were announced in 2023 and 2024. Ramboll's project history includes the Great Belt Bridge and Øresund Bridge in Denmark and Sweden, major building and cultural projects such as the Royal Danish Opera and the Tate Modern extension, and energy, transport, water, environmental, and urban-development assignments around the world. The group has also worked on projects in challenging or remote settings, including Antarctica. Today, Ramboll operates through a broad international network, with offices in more than 35 countries and activities concentrated in Europe and North America as well as selected emerging markets. Its strategic identity combines multidisciplinary engineering with architecture, environmental science, management consulting, and sustainability-oriented advice.
- 2024
K2 Management and SCC acquisitions announced
[1]The announced transactions expand renewable-energy advisory and scientific environmental-consulting capabilities.
- 2023
civity Management Consultants acquisition announced
[1]Ramboll adds specialist management-consulting capabilities in mobility and infrastructure-related fields.
- 2020
Henning Larsen becomes part of Ramboll
[1]The architecture practice joins Ramboll, reinforcing the group's integrated architecture and engineering model.
- 2018
OBG acquisition expands the Americas
[1]Ramboll acquires North American consultancy O'Brien & Gere, known as OBG, adding approximately 950 consultants.
- 2014
ENVIRON joins Ramboll
[1]The acquisition adds international environmental and health-science expertise.
- 2011
Expansion into power engineering
[1]Ramboll acquires DONG Energy Power's power-engineering section and also purchases Gifford in the United Kingdom.
- 2007
Acquisition of Whitbybird
[1]The UK engineering acquisition strengthens Ramboll's international building and infrastructure design capabilities.
- 2006
Acquisition of Storvik & Co.
[1]Ramboll expands its Norwegian engineering presence through the acquisition of Storvik & Co.
- 2003
Merger with Scandiaconsult
[1]The enlarged group becomes the largest consulting engineering firm in the Nordic region at the time.
- 1991
Merger with B. Højlund Rasmussen
[1]The merger expands Ramboll's multidisciplinary capabilities and contributes to the later adoption of the shorter Ramboll name.
Products and positioning
A foundation-owned, multidisciplinary engineering and consulting group positioned around technically complex projects, sustainable development, and the integration of engineering, architecture, environmental science, and management advice.
Building engineering and design
Buildings
Ramboll provides structural, mechanical, electrical, fire and life-safety, geotechnical, energy, and sustainability services for buildings and complex facilities. Its work covers concept development, detailed design, construction support, renovation, building performance, and asset strategies. The practice combines engineering with architecture and landscape capabilities, including those associated with Henning Larsen. Representative work includes the Royal Danish Opera and other major cultural, civic, commercial, and institutional buildings.
Transport infrastructure consulting
Transport
The transport business covers roads, bridges, railways, public transport, airports, ports, mobility systems, traffic planning, and transport safety. Ramboll supports clients from strategic planning and feasibility through engineering, procurement, construction, operations, and modernization. Its Nordic infrastructure portfolio includes work connected with the Great Belt Bridge, the Øresund Bridge, railway electrification, the Fehmarn Belt Fixed Link, and UK rail programmes.
Energy and power consulting
Energy
Ramboll advises utilities, governments, developers, investors, and industrial clients on power systems, renewable generation, offshore wind, energy markets, decarbonization, hydrogen, district energy, and energy infrastructure. The group expanded this capability through the acquisition of DONG Energy Power's power-engineering section and later renewable-energy-related acquisitions. Its services range from strategy and technical due diligence to design, permitting, owner engineering, and project delivery.
Environmental and health consulting
Environment & Health
This practice addresses environmental assessment, contaminated land, environmental risk, climate adaptation, sustainability, health science, permitting, impact assessment, and regulatory compliance. The acquisition of ENVIRON significantly enlarged the platform's international environmental and health-science expertise. Ramboll supports public and private clients with scientific analysis, remediation planning, environmental management, climate strategy, and decisions affecting communities and ecosystems.
Water and wastewater consulting
Water
Ramboll works across water supply, wastewater, drainage, flood protection, coastal resilience, water resources, treatment, and urban water management. Services include planning, modelling, engineering design, environmental assessment, asset management, and support for climate adaptation. The business connects water infrastructure with broader urban, environmental, and resilience objectives rather than treating treatment plants and networks as isolated engineering assets.
Architecture and landscape design
Architecture & Landscape
Through its architecture and landscape activities, including Henning Larsen, Ramboll provides urban design, master planning, architecture, public-realm design, landscape architecture, and design strategies for sustainable communities. The offering is intended to integrate spatial quality with structural, environmental, energy, mobility, and social requirements. It supports projects ranging from individual buildings and cultural institutions to campuses, districts, and major urban developments.
Management and strategy consulting
Management Consulting
Ramboll's management-consulting activities support strategy, organizational change, economics, mobility, infrastructure, public services, sustainability, and transformation. The practice complements the group's technical delivery by helping clients define programmes, assess options, manage portfolios, improve operations, and implement policy or investment decisions. The civity acquisition further strengthened specialist advisory capabilities in mobility and infrastructure.
Brand decisions
2019
Agreement to acquire Henning Larsen ArchitectsM&ABackground
Ramboll aimed to deepen the integration of architecture, landscape, engineering, and sustainability expertise.
Action taken
Ramboll announced the acquisition of Henning Larsen Architects in December 2019; the transaction became effective on 2 January 2020.
Aftermath
The group strengthened its architecture and design proposition while retaining Henning Larsen as a recognizable practice.
2014
Acquisition of ENVIRONM&ABackground
Ramboll wanted to scale its environmental, climate, risk, and health-science offering internationally.
Action taken
The company acquired ENVIRON, adding more than 1,500 specialists across 21 countries according to the cited reference.
Aftermath
Environmental and health consulting became a larger component of Ramboll's global platform.
2011
Divestment of Ramboll InformatikStrategyBackground
Ramboll was concentrating its portfolio on engineering, architecture, environmental services, and related consulting disciplines.
Action taken
Ramboll Informatik was divested to Danish IT company KMD.
Aftermath
The divestment simplified the portfolio and allowed Ramboll to focus more clearly on its core professional-services activities.
2003
Merger with ScandiaconsultM&ABackground
Ramboll sought greater scale and multidisciplinary reach in a Nordic consulting-engineering market.
Action taken
Ramboll merged with rival Scandiaconsult and operated as a significantly larger Nordic engineering consultancy.
Aftermath
The combined organization became the largest consulting engineering firm in the Nordic region at the time and increased its international orientation.
1972
Transfer to foundation ownershipStrategyBackground
Ramboll's owners sought to protect the firm's independence, long-term continuity, and ability to reinvest rather than orienting the business toward short-term shareholder returns.
Action taken
Ownership was transferred to an employee-controlled foundation whose stated purposes included supporting the company, employees, clients, and communities.
Aftermath
The foundation-owned structure remains a defining feature of Ramboll's governance and private-company identity.
Recent events
- Unconfirmed
Ramboll acquires EYP Mission Critical Facilities[3]
Reported:
Ramboll acquired data center consultancy EYP Mission Critical Facilities. The deal terms were not disclosed.
Ramboll appoints India Country Director[4]
Reported:
Ramboll announced that Vidya Basarkod is its new Country Director for India.
Ramboll appoints managing director for global energy division[5]
Ramboll appointed Michael Thorndahl Simmelsgaard as managing director of its global energy division, replacing Thomas Rand.
Sources5 sources
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