“What sets TransitionPlan apart is their ability to seize opportunities: opening doors, creating clarity, and helping us build the foundations for long-term impact in new markets.”
Meet Gregory Donovan, Founder of Avondale Private Capital, and see how TransitionPlan is helping Avondale scale climate impact across Europe.
Our Mission: Your Strategic Advantage
At TransitionPlan, transformation is more than a response to change—it’s a strategic capability.
In an environment where competitive advantages erode faster than ever, we help organizations seize moments of transition as opportunities for reinvention.
Whether it’s navigating regulatory shifts, integrating sustainability into the core business, leading through leadership change, or aligning operations post-merger—we turn complexity into clarity, and compliance into competitive edge.
Built as an international advisory from the outset, TransitionPlan brings a global lens to both local and cross-border challenges. Our approach combines strategic foresight, regulatory fluency, and narrative precision to unlock meaningful change and long-term value.
As trusted partners to our clients, we don’t just prepare organizations for what’s coming—we help them lead what comes next.
Driving the Mission: Our Founding Team
“Sustainability isn’t about ticking boxes. It’s about anticipating disruption, managing risk, and making better decisions. At TransitionPlan, that’s our starting point.”
Martin-Sebastian Abel • Founder & MD
Martin-Sebastian Abel is a recognized leader in ESG and sustainability, with extensive experience in public and private sector organizations.
Over his career, he has held various senior positions—leading ESG transformation projects for financial services clients, aligning corporate strategy with regulatory frameworks such as CSRD, and building the Sustainability Business Consulting Unit at an international PR firm. In addition to his consulting expertise, Martin-Sebastian is a Certified Expert in Sustainable Finance and a GRI-certified professional. He holds an MBA from WHU – Otto Beisheim School of Management and lectures on green and sustainable finance at the Frankfurt School of Finance. He is also an alum of Columbia Business School.
Martin-Sebastian is part of the European Leadership Accelerator of the Atlantic Council, where he contributes to transatlantic dialogue on sustainability, innovation, and the green transition. His academic work includes co-authoring peer-reviewed publications on climate accounting and sustainable finance.