Clear Course for Companies in Transition

Precision with Foresight – Navigating Toward Sustainable Business Success

With strategic foresight and precise execution, I support companies that aim to navigate through change, growth or restructuring with confidence. Every phase of transformation requires decisive leadership, dependable guidance and the ability to identify opportunities early.


Portrait von Rainer Leu - Managing Director von Leu Advisory Services GmbH
Mag. Rainer Leu – Leu Advisory Services GmbH

Expertise in Key Moments – M&A, PMI, Interim CFO Competence

For over 30 years, I have guided national and international companies through complex transformations—from mergers and acquisitions to post‑merger integrations and serving as interim CFO. I lead sophisticated M&A transactions, oversee integration projects and steer finance departments through phases of growth, upheaval and restructuring. In doing so, I combine rigorous analysis with a clear focus on practical, sustainable solutions that deliver enduring impact.

Mag. Rainer Leu

30+ M&A-Projects

3+ large-scale PMI-Projects

25+ Jahre CFO-Experience

What Sets Me Apart

  • More than 30 successfully implemented M&A projects.
  • Personal leadership in major post‑merger integrations, including for PORR, Revalize, and OneQrew.
  • CFO experience across corporate groups, mid-sized companies and PE‑backed software firms.
  • Deep industry knowledge in construction, IT, real estate, and manufacturing.
  • International leadership experience within CEE, SEE and DACH regions.
  • Strength in integration, negotiation savvy and a sharp focus on what truly matters.

Complex projects sometimes demand more than one viewpoint—so when needed, I collaborate on a project-specific basis with trusted partners to complement my expertise.

If you’d like to learn more, feel free to write to me or connect on LinkedIn.