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People who companies
truly understand.

Behind DeFORIS is an interdisciplinary team with decades of experience in entrepreneurship, the SME sector and industry, along with a selected and strong network of specialists. Together, we support companies personally, reliably and as equals.
Sebastian Tsoleridis
Bachelor of Arts (B.A.)
General Management
Owner
Frank Weigelt
Bachelor of Engineering (BA)
Business Mediator (IHK)
Entrepreneur
Susanne Steffens
Office Administrator
Administration

Reliable partners.
Strong network.

Our network broadens our perspective. Experienced partners from diverse specialist fields contribute their expertise specifically to projects. This results in holistic solutions that reliably support companies.
Simone Beitzel
Leadership & Resilience
Fabian Drasdo

Anne Fischer
Data Privacy & IT Security
Anne Fischer
Niko Jünger

Friederike Lehnen
Leadership & Communication
Friederike Lehnen - FL-Coaching
Susan Leinen
Executive Search & Career Coaching
Susan Leinen
Steven Megerle
Marketing & Design
Steven Megerle - new media labs
Dr. Björn Müller
Commercial and Company Law
Dr. Björn Müller
Rüdiger Paulus
Logistics & Supply Chain
Rüdiger Paulus
Denise Plein
Leadership & Change
Denise Plein
Josef Roos
Diplom-Kaufmann
Thomas Sasserath
Processes & Projects
Thomas Saßerath
Jenny Weber
Clarity & Energy
Tim Weber
Work-Life-Flow
Tim Weber
Renata Zukaite-Schmitz
Modern people management
Renata Zukaite-Schmitz
Companies choose DeFORIS because they are looking for clarity and reliability.
Let's start a conversation and find out together how we can support you in your individual situation. See things more clearly with a fresh perspective from the outside!
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DeFORIS Unternehmensberatung advises small and medium-sized enterprises throughout Germany in the areas of business succession, corporate health check, restructuring, real estate and interim management, with offices in Cologne and Wittlich.
DeFORIS © 2026 - Design and development of new media labs