Continuing its global expansion plan, Integrity360 has acquired leading cyber security specialist Holiseum headquartered in Paris, France. The terms of the transaction were not disclosed. The acquisition will enable Integrity360 to accelerate its growth in France and continental Europe, and significantly provide a new and exciting services practice focused on Operational Technology (“OT”) and Internet of Things (“IoT”) technologies which complement Integrity360’s existing service practices.
Those include cyber risk and assurance, cyber security testing, incident response, infrastructure, Microsoft cyber, payments compliance, and a highly comprehensive range of cyber security managed services including managed detection and response (“MDR”) solutions. Holiseum will continue to operate from its existing three facilities in France but with the benefit of the full resources and capability of the wider Integrity360 business.
Holiseum, founded in 2018, is a highly respected and well-established cybersecurity consultancy that specialises in critical and industrial infrastructure. It serves approx. 80 customers throughout France and selected international locations from facilities in Paris and Nimes including organisations operating in the energy, infrastructure, manufacturing, transport and financial sectors.
In particular, Holiseum is an expert in OT technology and has helped many global corporate and infrastructure organisations secure and evolve their OT environment and associated IT estates. Holiseum’s reputation is underpinned by several security accreditations from ANSSI – the National Cybersecurity Agency of France – including PASSI (cybersecurity audit services) and PACS (cybersecurity support and consulting) – where Holiseum is one of the first three certified organisations in France. Holiseum’s portfolio of services include audit, training, investigation and a full suite of OT consulting solutions.
Securing critical infrastructures is a high priority for many governments and corporate organisations across the globe due to the alarming rise in attacks on industrial and energy infrastructure. Leading industry analyst Gartner has commented that such attacks could result in the weaponisation of OT environments to seriously harm human life.
Despite the tightening of the regulatory environment with the introduction of cyber security frameworks including NIS2 (Network and Information Security 2) and DORA (Digital Operational Resilience Act) the challenge of continuously securing critical infrastructure remains acute. Holiseum will form a major new practice within Integrity360 dedicated to the mission of aiding, protecting and supporting both government and industrial infrastructure. The existing Holiseum team of 32 will be rapidly expanded in France and across all other Integrity360 markets in support of this mission.
In addition, Holiseum’s headquarters in Paris will form a new regional hub for the group from which it will deliver the full suite of Integrity360 services, and during 2025 an additional Paris based SOC (Security Operations Centre) will be launched to join the existing network of six SOCs across EMEA (Dublin, Stockholm, Naples, Sofia, Madrid and Cape Town).
The SOC teams deliver a wide-ranging set of managed services for customers including EDR, XDR and MDR (Endpoint Detection and Response, Extended Detection and Response, and Managed Detection and Response). Integrity360’s innovative range of services have been recognised on multiple occasions by Gartner, namely as a Representative Vendor in the Gartner market guide for Managed Detection and Response services.
The addition of Holiseum brings group revenues to over €160m and a dedicated cybersecurity team of over 700 employees. Further innovation and demand for its services across the EMEA region will expand group revenues in 2025 across all territories.
Ian Brown, Executive Chairman at Integrity360 commented: “We are very excited to be welcoming the team from Holiseum to Integrity360. We are highly impressed with the track record, achievements and skills of the Holiseum team in critical and industrial infrastructure which will be highly complementary to the existing capabilities of the group. Both organisations share the same passion for technical excellence, customer service and innovation.
“The enhanced group will significantly expand Holiseum’s considerable expertise in OT/IoT environments for the benefit of customers both in France and across all other EMEA locations. Paris will also serve as an additional Integrity360 key regional hub from which we will deliver an expanded set of services for the benefit of our combined customers over the coming months and years.”
An Nguyen and Faiz Djellouli, Founders and Directors of Holiseum, commented: “We are both really delighted that Holiseum is joining Integrity360 and continuing the journey that we started in 2018. Thanks to the support of our customers and employees Holiseum has grown to become one of the leading experts in cybersecurity for critical infrastructure within Europe.
“Holiseum is delighted to be continuing that journey but with Integrity360’s support, allowing us to further expand our team, our services and our market coverage. Our skills combined with those of Integrity360 will provide an extension of our portfolio of services for OT environments. This is really great news for our employees, and customers, and the whole team at Holiseum are really looking forward to working closely with Ian and the wider Integrity360 team over the coming years.”
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