Mr. Doug Ammerman reports

GORD JOHNSTON TO TRANSITION TO VICE CHAIR OF STANTEC'S BOARD OF DIRECTORS

Gord Johnston will retire as president and chief executive officer of Stantec Inc., effective Oct. 1. Mr. Johnston will remain on the board, taking on the role of vice-chair. Susan Reisbord, currently chief operating officer of the North America business, has been appointed as the next president and chief executive officer.

"Susan is a proven leader with a strong track record of delivering results," said Doug Ammerman, chair of Stantec's board of directors. "Under Susan's leadership, Stantec is well positioned to deliver on its commitments today, while advancing into its next chapter of growth, including the development and execution of the company's next strategic plan."

"Susan is the right leader for Stantec's next chapter," said Mr. Johnston. "She understands our business, our strategy and our culture, and will continue to drive operational excellence and growth across the company. I have full confidence in her and in the company's future."

Deep commitment to continuity

This transition is the result of a long-standing, board-led succession plan. Stantec's client relationships, project delivery and operational focus remain unchanged, reflecting the strength and consistency of its leadership platform.

Ms. Reisbord brings more than 30 years of experience in the industry, joining Stantec in 2021, with the acquisition of Cardno, where she was the CEO. Ms. Reisbord became the business operating unit leader for Stantec's environmental services business line, before being promoted in 2025 to chief operating officer for North America, the company's largest geographic operating unit.

"As I step into the role of CEO, I'm excited to do so from a position of strength and stability -- which is a direct reflection of the quality of our people," Ms. Reisbord said. "Stantec does astounding work that matters deeply to the clients and communities we serve. I'm proud to take this great company forward and I thank Gord for the foundation he's laid before me."

A strong legacy, a clear path forward

During his 8.5 years as CEO, Mr. Johnston led Stantec through a period of significant transformation -- strengthening its global platform, sharpening its strategic focus, and reinforcing a culture grounded in collaboration, technical excellence and purpose. Under his leadership, Stantec advanced its position as a truly global, innovative and resilient professional services firm, navigating industry cycles with discipline while continuing to invest in people, capabilities and long-term growth.

"On behalf of the board, I want to thank Gord for his outstanding leadership," said Mr. Ammerman. "Over his tenure as CEO, he expanded our global footprint, refined our strategy and built a deep, capable leadership team that positions the company well for the future."

"As I step away from the role of president and CEO, I do so with great pride and gratitude -- pride in our people and gratitude for all we've been able to accomplish together," said Mr. Johnston. "Stantec is a strong company with a bright future. I have tremendous confidence in where it is headed under Susan's leadership and I look forward to continuing to support the company's success as vice-chair of the board."

About Stantec Inc.

Stantec empowers clients, people and communities to rise to the world's greatest challenges at a time when the world faces more unprecedented concerns than ever before.

Stantec is a global leader in sustainable architecture, engineering and environmental consulting. The company's professionals deliver the expertise, technology and innovation communities need to manage aging infrastructure, demographic and population changes, the energy transition, and more.

Today's communities transcend geographic borders. At Stantec, community means everyone with an interest in the work that the company does -- from its project teams and industry colleagues to its clients and the people its work impacts. The diverse perspectives of Stantec's partners and interested parties drive the company to think beyond what has previously been done on critical issues like climate change, digital transformation, and future-proofing cities and infrastructure.

Stantec consists of designers, engineers, scientists, project managers and strategic advisers. The company innovates at the intersection of community, creativity and client relationships to advance communities everywhere, so what is possible can be redefined together.

Stantec trades on the Toronto Stock Exchange and the New York Stock Exchange under the symbol STN.

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