We are pleased to announce that four of our outstanding leaders: Andrew Portengen, Mike Brady, Tim Dietrich, and Willem Kellerman, have been appointed as partners as of November 6, 2025. Please join us in congratulating our new partners!
Their appointments reflect the strength of our team across Canada and reinforce our commitment to design excellence and exceptional client experiences. These leaders bring the expertise and vision required to deliver outstanding work for our clients and community.
Andrew Portengen | Mechanical Lead and Principal
With over 11 years of experience in mechanical design and project leadership, Andrew is known for his collaborative approach and technical precision. He specializes in creating high-performing HVAC and plumbing systems that balance energy efficiency, occupant comfort, and long-term value.
Andrew’s focus on innovation and performance reflects WalterFedy’s commitment to integrated design excellence and a client experience rooted in trust and quality. His leadership ensures that every project delivers measurable impact for clients and communities, while fostering a culture of collaboration and continuous improvement that advances the firm’s growth and capabilities.
Mike Brady | Vice President of Operations, Western Canada Buildings Division
Mike brings more than 27 years of experience in engineering, project management, and business operations to his role as Vice President of Operations for our Western Canada Buildings Division.
A collaborative and values-driven leader, known for his operational insight and focus on excellence, Mike plays a key role in advancing WalterFedy’s strategic growth and integrated project delivery across the region. His appointment underscores the firm’s commitment to quality, innovation, and partnership,ensuring every project experience is seamless and delivers meaningful results.
Tim Dietrich | Electrical Lead and Principal
A champion of sustainable, energy-efficient design, Tim has more than 20 years of experience developing innovative electrical systems for buildings across Canada. His work combines technical excellence with a deep understanding of how spaces perform for the people who use them.
Tim’s leadership will continue to advance our expertise in low-energy, resilient infrastructure, ensuring our clients’ projects meet the highest standards for performance and sustainability.
Willem Kellerman | Managing Principal, Western Canada Buildings Division
With over three decades of architectural experience, Willem brings a global perspective and a deep commitment to thoughtful, client-centered design. His diverse portfolio is unified by his focus on creating environments that balance functionality, beauty, and community impact.
As Managing Principal of our Western Canada Buildings Division, he has been instrumental in growing our architectural practice in the West and reinforcing our commitment to client-centered design. Willem’s dedication to quality, collaboration, and innovative thinking continues to shape exceptional spaces and experiences for our clients.
Strong leadership builds strong teams — and strong teams deliver exceptional results.