Xendo is a leading, independent consultancy and project management organization in the (bio)pharmaceutical, medical devices and healthcare fields. Our ambition is to enhance the quality and safety of medicine and help shorten the time to market for drugs and medical devices that improve the quality of life.

For over 25 years we have supported hundreds of clients in more than 25 countries worldwide. For further information please contact us at . Or just click one of the buttons to find out what Xendo can do in your area of expertise.

Company structure

Our organization is structured per discipline, offering our broad palette of services to the (bio) pharmaceutical, medical device, and healthcare fields. The headquarters is located in Leiden, The Netherlands with additional offices in Berlin, Germany and Stockholm, Sweden and we have representations in the United Kingdom and Japan.

As a ProPharma Group company, we are now also represented by offices in the US (Kansas City, St. Paul, St. Louis, and Bozeman), Australia (Melbourne). Additional offices in the UK and Japan also strengthen our position in these areas.

Company structure


  • 1990

    Eurovalid is founded in Amsterdam, providing compliance and validation services to the pharmaceutical industry.

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  • 1995

    Eurovalid is incorporated into Eurovalid B.V.

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  • 1996

    Arthemius v.o.f. was founded, to bring additional expertise for the biotechnology sector.

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  • 1997

    Eurovalid B.V. and Arthemius v.o.f. internally merge to form Eurovalid-Arthemius B.V.

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  • 1998

    Helix Engineering B.V. starts collaboration with Eurovalid-Arthemius B.V. to expand the range of services with pharmaceutical engineering.

    New activities are employed by starting VipQuip B.V., offering services on metrology and calibration.

    Probion B.V., delivering management and business development services to the (bio)pharmaceutical industries, teams up.

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  • 1999

    Xendo Laboratories B.V., a bioanalytical contract laboratory is founded in Groningen.

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  • 2000

    The company headquarters move from Amsterdam to the Bio Science Park Leiden.

    Univalid Holding B.V. becomes the umbrella company over all operating companies. The names of the different operating companies in Leiden are uniformed:

    Eurovalid-Arthemius B.V. changes to Univalid Compliance and Validation B.V.
    Helix Engineering B.V. changes to Univalid Engineering B.V.
    Probion B.V. changes to Univalid Management and Development B.V.
    Vipquip B.V. changes to Univalid Metrology B.V.
    Xendo Laboratories B.V. although part of Univalid Holding B.V. keeps its name.

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  • 2002

    Univalid Holding B.V. acquires a part of Bird Engineering B.V. to form Univalid Bioprocessing B.V.

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  • 2004

    Xendo Drug Development B.V. expands with Xendo Clinics B.V., a 12-bed Clinical Pharmacology Unit for phase I/IIa clinical research, and Xendo Pharma Design B.V., a consultancy firm focusing on strategic drug research and development, both on the premises of the University Medical Centre Groningen.

    Xendo Drug Development B.V., a 100% subsidiary of Univalid Holding B.V., is founded in Groningen, to hold Xendo Laboratories B.V.

    Quality Engineering, a business unit of Univalid Engineering B.V. internally merges with Univalid Metrology B.V. to form Univalid Technical Support B.V.

    Univalid Bioprocessing B.V. moves its research and pilot laboratories from Delft University to the Bio Science Park in Leiden.

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  • 2005

    Xendo Clinics B.V. opens a second 14-bed Clinical Pharmacology Unit for phase I/IIa clinical research on the premises of the University Medical Centre Groningen.

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  • 2006

    As of January 1st, 2006, Univalid Holding B.V. has been restructurered and renamed Xendo B.V. Xendo employs close to 200 people and is comprised of three operational divisions:

    Xendo Drug Development B.V.
    Xendo Manufacturing B.V.
    Xendo Pharma Services B.V.

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  • 2007

    Xendo B.V. forms a joint venture with the University Medical Center Groningen. The joint venture, Xendo Clinical Trial Material, will produce drug candidates on small scale according to Good Manufacturing Practices.

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  • 2008

    The Groningen site expands its clinical research portfolio offering (temporary) contract research services in support of phase II – IV studies with drug and medical device candidates. These services are offered through a new division named Xendo Clinical Research.

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  • 2009

    The Leiden site realigns its structure to better serve our customers. Three divisions were formed, creating a maximal synergy:

    Xendo Manufacturing
    Xendo Pharma Services
    Xendo Regulatory Affairs
    Xendo establishes Xendo Deutschland in Berlin, to better meet the needs of German customers. Focus of the German services are on regulatory affairs for drugs and medical devices, from initial set-up to maintenance of dossiers.

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  • 2010

    As per July 2010 Xendo Drug Development has been acquired by QPS (an international CRO). The Xendo consultancy and manufacturing activities continue under the name Xendo.

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  • 2011

    Xendo BV and Batavia Bioservices BV have initiated a strategic business collaboration. As a consequence, all Bioprocess activities of Xendo Manufacturing BV have been transferred to Batavia Bioservices BV. Through this collaboration Xendo can continue to offer Bioprocessing services.

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  • 2013

    Xendo BV has acquired the Vigilex Group allowing Xendo BV to further expand its palette of services with pharmacovigilance activities and at the same time have new branches in the United Kingdom and Japan.

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  • 2015

    Xendo has acquired Brinker Pharma GmbH allowing Xendo to further expand its presence in the German market offering the full range of consultancy services.

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  • 2016

    Sovereign Capital, the UK private equity Buy & Build specialist, has completed the management buy-out of Xendo BV. Sovereign has partnered the management team to further develop the business through a strategy of organic and acquisitive growth.

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  • 2017

    Xendo has acquired the Swedish consultancy company Sofus Regulatory Affairs AB. Sofus is based in Stockholm and provides regulatory affairs services for all phases of the pharma and biotech development, from early development projects to post-approval services including pricing and reimbursement issues, and has a strong position in the Nordic countries.

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  • 2018

    ProPharma Group acquires Xendo Holding B.V., and its subsidiary Sofus Regulatory Affairs AB, further globalizing our compliance consulting, engineering & technical support, regulatory affairs, and pharmacovigilance services.

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Management NL

Hans Luijendijk
MsPharm - General Manager Europe
Arjen Huijs - CFO Europe
Arjen Huijs CFO Europe
Kirsten Lingbeek-Brummelhuis, MSc, pharmacist Director Pharmacovigilance a.i.
Kirsten Lingbeek-Brummelhuis MSc Pharmacist - Director Pharmacovigilance a.i.
René Nanninga, MSc Director Engineering & Technical Support
René Nanninga MSc - Director Engineering & Technical Support
Ienke Brombacher Pharmacist - Director Regulatory Affairs
Eric van der Aa
Eric van der Aa Ph.D. - Director Compliance & Validation
Herman Keetman - Finance Manager
Herman Keetman Group Controller
Wouter Dolle - HR Manager
Wouter Dolle HR Manager

Mission & Vision

It is our mission to provide optimal solutions for our life science customers during the full life cycle of their products and health care solutions.

Xendo provides consultancy and project management in the area of healthcare product development, manufacturing, compliance, validation, regulatory affairs and engineering.

It is our vision to actively contribute to the success of our customers through sustainable solutions.

Our team of professionals is our greatest asset and is recognized for its multidisciplinary, knowledge-driven, and practical approach.


Xendo assists her customers to increase the quality and safety of their products and services. From her experience in the field, Xendo translates customer needs into clear projects and executes these according to applicable regulations and standards. To ensure that we meet these expectations we have an ISO 9001:2008 certified quality system.

The employees are the foundation for the quality of Xendo services. The knowledge management at Xendo promotes knowledge exchange within the company and furthers the growth of her individual professionals. The knowledge management also contributes that from the broad scope of expertise within Xendo, the right expert is fit for the right project.


MSc - Director QA