Integrity360 Expands Cybersecurity Reach with Strategic Holiseum Acquisition

Integrity360 Expands Cybersecurity Reach with Strategic Holiseum Acquisition

The short version:

• Strategic Acquisition: Irish security services firm Integrity360 has bought Paris-based Holiseum, which specializes in securing critical and industrial infrastructure, including Operational Technology (OT) and Internet of Things (IoT) systems.
• Market Expansion: The deal gives Integrity360 a base in France.
• Key Players: Holiseum becomes Integrity360’s French practice and regional hub.
• Future Trends: Demand for OT and IoT security is rising across European industry.

Integrity360 moves into France

Integrity360, a Dublin-based security services company, announced on March 20, 2025, that it had acquired the French company Holiseum for an undisclosed sum. It is a foothold in France. The deal also adds expertise in Operational Technology (OT) and Internet of Things (IoT) security, two areas where demand from industrial customers has been climbing faster than the supply of people who know how to protect those systems.

What Holiseum brings

Holiseum works with operators of critical and industrial infrastructure, the kind of clients whose control systems run plants, energy networks and transport. Integrity360 gets that specialist team and its client base. Holiseum will operate as an Integrity360 practice and as the company’s hub for France.

An earlier version of this article quoted “the CEO of Integrity360” without naming him or citing a source. We could not match the wording to the company’s announcement and have removed it.

Market Expansion: Strengthening European Cybersecurity Services

Integrity360 has been growing across Europe through acquisitions. Demand for OT and IoT security there is rising, pushed by regulation such as the EU’s NIS2 directive and by attacks on industrial sites.

Holiseum’s local presence gives Integrity360 French-speaking staff and relationships. Integrity360 said it also plans to open a security operations center in Paris.

Key Players: Rising Influence in the Cybersecurity Sector

Integrity360 is already one of the larger security services firms in Ireland and the UK. Holiseum adds niche OT and IoT skills that are hard to hire for.

A second quote, attributed only to “a representative from Integrity360,” has also been removed because we could not trace it.

Future Trends: Focus on OT and IoT Security

Factories, utilities and transport operators keep connecting more equipment to their networks. Each connection adds risk. Buying specialists is faster than training staff from scratch.

Expect more deals like this one. Security services firms are consolidating, and OT expertise is one of the skills they are paying for.

What to watch

The deal is small but strategic. It gives Integrity360 a French base and OT credibility, and the next step will be the Paris SOC. For French industrial clients, it means a local specialist backed by a larger European provider.

Dan Evert, CCNP

Dan Evert is a self proclaimed Router Jockey. Dan got heavily involved in networking right out of high school and has never looked back! Dan is giving back by working with high school students to get them involved and interested in Networking and Security.