diadikasia Names Aristodimos Thomopoulos as CEO in Internal Succession

Aristodimos Thomopoulos Takes the Helm at diadikasia

Greek consultancy diadikasia, a member of the BRIGHTGROUP holding, has appointed Aristodimos Thomopoulos as its new chief executive, following the signing of an updated company charter. The move formalizes a leadership handover at a firm that has spent more than three decades advising public- and private-sector organizations on strategy and transformation.

Thomopoulos is an internal appointment rather than an outside hire. He joined diadikasia in 1999 and progressed through project management, partner and vice chairman roles, accumulating more than 25 years of experience in administrative reform and digital transformation programs for public bodies. The company describes the promotion as the natural next step in a career closely tied to its own growth.

In a statement, Thomopoulos said the firm will continue with the same vision, emphasizing consistency, quality of service and a people-centered approach, and pledged to keep adding value for clients and partners while contributing to the transformation of the Greek economy. George Poulopoulos, president of diadikasia and CEO of BRIGHTGROUP, endorsed the appointment, pointing to Thomopoulos's strategic thinking and more than two decades of commitment to the firm.

diadikasia operates under BRIGHTGROUP's Bright Consulting pillar, alongside Bright Business Solutions and Bright Academy, while the group's technology pillar houses DigiTech and DigiCar. BRIGHTGROUP reports more than 1,000 professionals and a backlog above €200 million, with operations in Greece and the Balkans, giving the CEO change significance beyond the firm itself.

Why This Handover Matters for diadikasia and BRIGHTGROUP

A Succession Built on Institutional Memory

The appointment is a promotion from within, not a change of direction. Thomopoulos has spent his entire career at diadikasia since 1999, most recently as vice president of the board, which means he already knows its public-sector clients and project delivery model. For a consultancy whose work depends on long-running administrative reform and transformation programs, that continuity lowers the execution risk normally associated with a CEO transition.

What It Signals for BRIGHTGROUP's Two-Pillar Structure

BRIGHTGROUP presents itself as covering the full transformation value chain, from strategy consulting to technology implementation. diadikasia is part of the Bright Consulting pillar, while DigiTech and DigiCar operate under Bright Technology. The group's statement explicitly mentions leveraging the synergies that come from diadikasia's membership in BRIGHTGROUP — a hint that the new CEO is expected to connect consulting clients with the group's AI, GovTech and cybersecurity offerings, rather than simply run the consultancy as a standalone business.

Public Sector Work Remains the Anchor

Thomopoulos's background is concentrated in administrative modernization of state bodies and in the delivery of related funding programs. That points to continuity in diadikasia's core market: Greek public administration. The strategic question is not whether the firm changes focus, but whether the wider group converts its consulting access into larger technology-implementation mandates.

What Clients and Rivals Should Expect From the New CEO

For clients, competitors and partners of diadikasia, the appointment is a continuity signal with three practical implications:

• Public-sector clients with active reform or digital transformation projects should expect managerial continuity, because the new CEO has led similar initiatives for over 25 years and the board publicly endorsed the handover.
• BRIGHTGROUP's emphasis on synergies suggests clients will increasingly be offered combined consulting and technology packages drawing on DigiTech and DigiCar, alongside diadikasia's advisory work.
• Rivals in the Greek consulting market should treat the €200 million-plus backlog and 1,000-strong workforce as the foundation for potentially larger integrated public-sector bids under the new leadership.