Concert Group announces leadership transition to support strategic growth

Concert Group Holdings, Inc., a specialised insurance holding company known for providing tailored solutions to programme insurance markets, has introduced a new executive leadership structure aimed at steering the company through its next phase of strategic and profitable expansion.

The plan, developed earlier this year, officially goes into effect today, Friday, August 1, 2025. As part of this transition, John Hendrickson will be stepping down as Chief Executive Officer.

While he is retiring from his executive role, Hendrickson will continue to serve on Concert’s Board of Directors, where his experience and perspective will remain an asset to the company.

Sam LaDuca, currently serving as Chief Actuary, will take over as CEO. LaDuca brings extensive industry knowledge and a deep understanding of Concert’s operations, having played a central role in shaping its risk strategy.

In another leadership adjustment, Matt Wagner, who holds the role of Chief Legal Officer and General Counsel, will assume additional responsibilities as President of Concert. His appointment reflects a broadening of his leadership role as the company prepares for its next chapter.

Chief Financial Officer Mike Rybak has announced plans to retire in June 2026, marking the culmination of a five-decade career in the insurance industry. Rybak will gradually transition out of his day-to-day role but will continue supporting Concert’s finance team until his retirement next year.

Katarina Scamborova, currently President of Harmony Re—Concert’s risk retention subsidiary—will step into the role of CFO while retaining her current position. Her appointment ensures continuity in financial leadership during this period of change.

Concert Group Holdings operates with a focus on building and managing risk-bearing entities that support programme managers and insurance markets with customised structures and reinsurance solutions. The newly announced leadership changes are part of a broader strategy to ensure continued operational strength in the years ahead.

“Our succession plan coincides with impressive operating performance, increasing market interest in partnering with Concert and significant growth in the fronting market,” commented Concert Chair Charles Slatery.

“Over the last two-plus years, John, Matt and Sam have collaborated closely to build a resilient operating, governance and risk management foundation which positions Concert well to deliver on our management’s ambitious plans for the next five years.

“Since its formation in 2021, Concert has assembled a top-tier leadership team that has navigated the company successfully through various market challenges, overseen the integration and development of Harmony Re as an innovative solution for risk retention in the fronting sector, and championed a singular set of values central to an enterprise committed to operational integrity.

“We are grateful for all that John has contributed to Concert since assuming the position of CEO two and a half years ago. We also greatly appreciate that both Mike and John will be available to provide ongoing support to their
successors to ensure a smooth and orderly transition.”

“I have genuinely enjoyed my time as Concert’s CEO,” said Hendrickson. “It has been challenging and gratifying in equal measure. The quality of the people working at Concert, and their commitment to its future, give me confidence that the company is destined for long-term success.

“Needless to say, I am delighted that Sam LaDuca is succeeding me as CEO. With more than 30 years’ experience, Sam’s depth of experience, his analytical mindset, and his collaborative nature make him ideally suited to lead Concert during its next stage of growth and development.

“Since joining Concert in March 2022, Sam has made a significant contribution, earning the respect and admiration of Concert’s Board of Directors and company employees. With Sam at the helm, I have no doubt about Concert achieving its goal of becoming a leading hybrid fronting carrier.

“It would be hard to overstate the value Matt Wagner has brought to the company. His perseverance, resilience and stewardship are unwavering. These traits have shone through during any number of issues facing Concert. Matt is the epitome of what Concert strives to attain: excellence in every regard, with a decency, integrity and compassionate humanity that are the hallmarks of his leadership.

“While Katarina Scamborova is stepping into the very experienced and capable shoes of Mike Rybak, there’s no doubting she’s up to the task. The work Katarina has done in bringing Harmony Re to market has been impressive. In addition, in working with Sam to develop our go-forward plan, she has deep, cross-functional insight across Concert’s operations and will lead the continued development of the Finance function with acumen and foresight.

“Katarina will benefit from the excellent foundation built by Mike and Scott Stosek, Concert’s Director of Finance. Scott and Katarina already have a well-established relationship, given Scott’s additional role as Harmony Re’s CFO.”