TAMAHRIS powered by ACT-ON GROUP becomes ACT-ON BELGIUM & ACT-ON GERMANY!

- PRESS RELEASE -

Brussels, September 11th, 2025 - ACT-ON GROUP, a leading company in organizational transformation, officially announces the launch of ACT-ON BELGIUM and ACT-ON GERMANY, effective September 11th, 2025. The two “Tamahris” agencies, based in Brussels and Munich, will now operate under their new brand identities.

One year after its acquisition by ACT-ON GROUP, this rebranding marks a key milestone in the integration of Tamahris’ teams while greatly expandingtheir service offerings to encompass the full range of the group’s expertise—far beyond their renowned capabilities in HRIS and Cornerstone solutions.

This move further strengthens ACT-ON GROUP’s presence in both European and international markets, in line with its growth strategy and its positioning as a leading “HumanTech” player..

A NEW BRAND IDENTITY
THAT REFLECTS A SHARED VISION AND COMMITMENT

Following a year of close collaboration and shared successes, ACT-ON GROUP and Tamahris are entering a new phase of integration of Tamahris’ teams by renaming the Belgian and German offices as ACT-ON BELGIUM and ACT-ON GERMANY.

This rebranding reflects a shared vision rooted in a common standard of excellence for clients. It signals the alignment of Tamahris’ ambitions with those of the group, the unity of their practices, and the coherence of their joint growth strategy—both locally and globally.

More than a name change, this new identity brings a long-standing collective commitment to life and makes it visible across the entire ACT-ON GROUP ecosystem, in France and beyond.

FROM SPECIALIZED EXPERTISE TO A COMPREHENSIVE OFFERING:
SUPPORTING END-TO-END ORGANIZATIONAL TRANSFORMATION

Known for their deep expertise in the implementation and deployment of the Cornerstone solution—enabling companies to optimize talent management through multimodal learning experiences and AI-powered tools—Tamahris teams have played a central role in building ACT-ON GROUP’s certified Cornerstone center of excellence.

By consolidating these capabilities under a single entity, with aligned methodologies and genuine knowledge sharing, ACT-ON GROUP has formalized a robust unit now structured as a Cornerstone Global Practice.

In parallel, the group is reaffirming its broader “Talent Management” offering, powered by over100 consultants from more than 10 nationalities—delivering increasingly tailored and high-performing solutions for clients.

And more is yet to come! Leadership teams from the group, Belgium, and Germany are already working on innovative service lines dedicated to talent management, blending Strategy, Business Consulting for Talent, and integration of best-in-class solutions and technologies across various HR domains, including HR administration.

Since June 2024, Tamahris has also benefited from strong backing to expand into all of ACT-ON GROUP’s business areas—including Consulting & Change, Data & AI, and Technology & IT. While this expanded scope was already effective in practice, it now gains clarity and visibility both locally and globally.

Geert Van Gucht & Vincent Van Lennep, co-founders and managing partners at Tamahris, explain:

“Rebranding Tamahris as ACT-ON BELGIUM & GERMANY anchors our operations
in the broader momentum driven by ACT-ON GROUP and expands the range
of services we can offer.

This is far from a cosmetic change. It reflects our ability to address more diverse client challenges and reinforces how our expertise complements the group’s.”

With this clarified value proposition now flying under the ACT-ON BELGIUM and ACT-ON GERMANY banners, the organization’s scope of operations is finally aligned with the day-to-day reality on the ground.

ACCELERATED EXPANSION
TO SUPPORT EUROPEAN AND GLOBAL AMBITIONS

With ACT-ON BELGIUM and ACT-ON GERMANY, ACT-ON GROUP is significantly expanding its reach across Belgium, the Netherlands, Luxembourg, Germany, and Poland. This increased presence in Europe also enables the group to connect with new clients operating across international markets.

By aligning the branding and service offerings of its Brussels and Munich offices with its own, the group is now equipped to deliver top-tier services at scale, in full alignment with its development strategy.

This momentum also benefits all employees, opening up exciting new opportunities in collaboration, innovation, career growth, and cross-border mobility.

Philippe Ferry, President of ACT-ON GROUP, underscores the importance of this evolution:

“Rebranding Tamahris as ACT-ON BELGIUM and ACT-ON GERMANY not only clarifies our organization—it’s a natural next step in executing our strategic vision.

By uniting our expertise under one identity, we give our European and global clients seamless support across their entire transformation journey—from upstream advisory to implementation and the latest in tech innovation, regardless of industry or geography.

It also opens up remarkable new possibilities for our teams.”

ACT-ON GROUP thus reaffirms a clear ambition: to be the go-to partner for large-scale organizational transformation. In Europe today. And worldwide tomorrow.

The launch of ACT-ON BELGIUM and ACT-ON GERMANY strengthens the group’s agility and brand visibility at both European and international levels. With a harmonized identity and high-value offering, ACT-ON GROUP is more equipped than ever to scale its impact and achieve its ambitions.

With a unified identity and a high-value offering, ACT-ON GROUP is better equipped than ever to accelerate its growth and realize its ambitions.

Further details on the rollout of this new identity and its implications will be shared in the coming weeks.

More about ACT-ON GROUP

More about ACT-ON Belgium

More about ACT-ON Germany