ROSEN Group
A global industrial technology group that develops and operates inspection systems and integrity-management solutions for pipelines and other complex assets.
Last updated August 31, 2026
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Overview
ROSEN Group is an industrial technology company with German origins and headquarters in Stans, Switzerland. It researches, designs, manufactures, operates, and evaluates inspection systems for pipelines and other technically complex infrastructure. Its principal customer base has historically been the oil and gas industry, although the group also serves offshore facilities, mining operations, industrial plants, tank farms, pressure vessels, refineries, and infrastructure connected with the energy transition. The company traces its origins to the engineering work of Hermann Rosen. After studying measurement and control technology, Rosen established an engineering business in Lingen, Germany, during the mid-1970s. Its early activities included measurement technology for agriculture and other applications. The ROSEN Group was formally established in 1981 and subsequently concentrated increasingly on pipeline-related equipment and services for oil and gas operators. In 1988, the business moved to an industrial park in Lingen, which remained an important operating and manufacturing location even after the corporate headquarters moved abroad. During the 1990s, ROSEN began internationalizing through offices in the United States, Canada, Mexico, Argentina, Malaysia, and Australia. Its international network expanded further in the following decade to include locations in the Netherlands, the United Kingdom, Saudi Arabia, the United Arab Emirates, Ukraine, Russia, Brazil, and Colombia. In 2000, the group moved its headquarters from Lingen to Stans in Switzerland while continuing to maintain substantial activities in Germany. The group is described as having more than 40 locations and operating in over 110 countries. ROSEN's core business uses instrumented inspection devices, commonly known in the pipeline industry as pigs, to collect information about the condition of pipelines and related assets. The company develops and manufactures much of this equipment internally and has described its vertical manufacturing integration as being approximately 85% to 90%. Inspection data is processed and analyzed to identify defects, degradation, weak points, and potentially hazardous areas. The resulting information supports maintenance, repair, integrity-management, and long-term investment decisions. The group organizes its activities around several business areas. Oil and Gas provides inspection services for pipelines and other industrial systems. Future Fuel addresses infrastructure for hydrogen, carbon dioxide, ammonia, and other renewable or low-carbon gases, including the possible repurposing of existing assets. Mining focuses on slurry pipelines and facilities exposed to the operating conditions of mining. Offshore covers offshore installations, pipelines, distributors, and processing systems. ROSEN has also invested in technical research, education, and regional social infrastructure. It has supported physics education at the University of Osnabrück since 1995, participated in scholarship programs, and established bilingual childcare, primary-school, and youth-support initiatives in Lingen. Its technology has received industry recognition, including awards for the RoMat PGS yield-strength measurement service and EMAT pipeline inspection technology. In November 2023, Partners Group acquired a majority stake in the formerly family-owned business for an undisclosed amount. The transaction was accompanied by a reorganization of the group and the separation of so-called new ventures from the main ROSEN business. Those activities were combined into the independent Rosenxt company, while Hermann Rosen retained a minority interest. Public reference material identifies different chief executives in connection with the post-transaction period, so the precise current executive arrangement requires verification.
History
ROSEN Group developed from the engineering activities of Hermann Rosen, a measurement and control technology specialist who established an engineering company in Lingen, Germany, in the mid-1970s. The early business worked on measurement-related equipment and services, including applications in agriculture. The company's later identity was shaped by its move into pipeline technology and services for oil and gas operators. The ROSEN Group foundation is dated to 1981. The company moved to an industrial park in Lingen in 1988. From there, it expanded beyond Germany during the 1990s, establishing offices in the United States, Canada, Mexico, Argentina, Malaysia, and Australia. This international growth reflected the geographically distributed nature of pipeline infrastructure and the need for inspection providers to support operators near their assets. In 2000, ROSEN moved its corporate headquarters from Lingen to Stans, Switzerland. The relocation did not end the importance of Lingen, which continued to host significant operations. In 2006, the group created a dedicated plastics-production operation there. The company opened an innovation center in Lingen in September 2012, with the facility inaugurated by Lower Saxony Minister-President David McAllister. A logistics center using a Kanban-based system followed in 2013. The group's international network continued to develop during the 2000s and 2010s, with additional locations in the Netherlands, the United Kingdom, Saudi Arabia, the United Arab Emirates, Ukraine, Russia, Brazil, and Colombia. Its technical work expanded beyond conventional pipeline inspection to include inspection of tank farms, pressure vessels, refineries, spiral pipes, offshore installations, mining slurry pipelines, and other complex industrial systems. A notable operational milestone occurred in October 2013, when ROSEN performed a continuous 1,224-kilometre inspection run in the Nord Stream pipeline. The company also developed specialized inspection and measurement technologies. Its RoMat PGS service was recognized by the American Society of Mechanical Engineers in 2015 for enabling measurement of the yield strength of carbon-steel line pipe. In 2017, the Canadian Energy Pipeline Association recognized ROSEN's EMAT inspection service as an industry innovation. Education and regional community programs became another part of the company's activities. ROSEN has supported the University of Osnabrück's physics advancement award since 1995 and has participated in the Emsland Scholarship and Germany's national scholarship program. In Lingen, it established the bilingual ROKIDS daycare in 2007, followed by the ROBIGS bilingual primary school in 2015 and the ROYOUTH extracurricular program in 2016. These initiatives were later organized under a separate subsidiary. Until 2023, Hermann Rosen led the corporate group for most of its history, apart from Friedrich Hecker's chief-executive tenure from 2013 to 2014. In November 2023, Partners Group acquired a majority stake in ROSEN for an undisclosed price. The transaction ended the company's status as a wholly family-owned business, although Hermann Rosen retained a minority holding. The post-acquisition structure separated new ventures and development projects from the core ROSEN business and placed them in the independent Rosenxt company. Reference material names Erik Cornelissen as the post-transaction chief executive and elsewhere identifies Andreas Opfermann as group CEO; this discrepancy should be resolved against current company records.
- 2025
Honoris Award
[1]The Consejo Colombiano de Seguridad presented ROSEN Group with its Honoris Award.
- 2023
Partners Group majority acquisition
[1]Partners Group acquired a majority stake in ROSEN, and the group reorganized its new ventures into Rosenxt.
- 2017
EMAT inspection innovation recognized
[1]The Canadian Energy Pipeline Association recognized ROSEN's EMAT inspection service.
- 2016
ROYOUTH program established
[1]ROSEN launched an extracurricular program for school-age children and young people.
- 2015
ROBIGS bilingual primary school opens
[1]The group's bilingual elementary school in Lingen opened in autumn 2015.
- 2015
Global Pipeline Award
[1]ROSEN received the ASME Pipeline Division's Global Pipeline Award for RoMat PGS.
- 2013
Nord Stream inspection milestone
[1]The company completed a 1,224-kilometre nonstop inspection run in the Nord Stream pipeline.
- 2012
Innovation center inaugurated
[1]ROSEN's innovation center in Lingen was opened in September 2012.
- 2007
ROKIDS bilingual daycare opens
[1]The group established a bilingual in-house daycare in Lingen for employees and their children.
- 2006
Dedicated plastics production established
[1]ROSEN established a separate plastics-production operation in Lingen.
Products and positioning
A vertically integrated, high-technology inspection and asset-integrity specialist serving energy, industrial, mining, and offshore infrastructure operators.
Pipeline inspection service
Inline pipeline inspection
ROSEN operates instrumented inspection devices, commonly called pigs, inside pipelines to collect information about corrosion, deformation, cracking, wall condition, material properties, and other threats. The resulting data is interpreted for operators and used to plan maintenance, repairs, and integrity-management activities.
Pipeline material measurement service
RoMat PGS
RoMat PGS is a ROSEN measurement service designed to determine the yield strength of carbon-steel line pipe. The measurement can help establish the pipe grade of individual pipeline sections against the API 5L standard and improve the technical basis for integrity assessment.
Pipeline inspection technology
EMAT inspection
ROSEN's EMAT technology is an electromagnetic-acoustic-transducer-based inspection approach for identifying relevant pipeline conditions. The service was recognized by the Canadian Energy Pipeline Association in 2017 as an innovation for oil and gas inspection.
Energy-transition infrastructure service
Future Fuel integrity solutions
The Future Fuel business area supports operators developing infrastructure for hydrogen, carbon dioxide, ammonia, and other renewable or low-carbon gases. Its work includes assessing existing pipelines and facilities for repurposing and contributing inspection data and integrity expertise to a more integrated low-carbon energy system.
Mining infrastructure inspection
Mining slurry-pipeline inspection
The Mining business unit addresses slurry pipelines and industrial equipment exposed to demanding mining conditions. Its services include inline inspection, technical evaluation, identification of weak points, and assessment of hazardous areas to support proactive maintenance.
Offshore asset inspection
Offshore inspection services
ROSEN's Offshore activities cover offshore installations and associated pipelines, distributors, processing equipment, and other complex systems. The business applies inspection and integrity-management capabilities to assets operating in offshore environments.
Brand decisions
2023
Accept majority investment from Partners GroupM&ABackground
ROSEN had operated as a family business under the leadership of Hermann Rosen for most of its history. In 2023, Partners Group agreed to acquire a majority stake.
Action taken
The ownership transaction was completed in November 2023. Hermann Rosen retained a minority interest, while the group reorganized its business structure.
Aftermath
New ventures and development projects outside the core ROSEN business were separated into the independent Rosenxt company. Public reference material gives inconsistent information about the post-transaction chief executive.
Acquisition price. (November 2023)
2013
Complete long-distance Nord Stream inspectionOtherBackground
Pipeline operators require inspection systems capable of covering long distances while maintaining data quality and operational continuity.
Action taken
ROSEN performed a continuous 1,224-kilometre inspection run in the Nord Stream pipeline.
Aftermath
The run was described as the company's longest nonstop inspection at that time and demonstrated its ability to execute large-scale pipeline inspection operations.
Recent events
ROSEN introduces TBIT Ultra tank inspection service[2]
Reported:
ROSEN introduced TBIT Ultra, a service for inspection of aboveground storage tanks that identifies, quantifies, and reports defects.
Sources2 sources
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