mcCallumSather has advanced several team members across its architectural, interior design, and mechanical teams, reflecting the firm’s commitment to people, collaboration, and long-term leadership in design. These advancements recognize individuals whose expertise and integrated approach continue to shape how the firm guides clients through complex design and delivery environments.
Stephanie Hebbes has advanced to Senior Interior Designer. Stephanie is known for her technically rigorous and client-focused approach to interior design, bringing a high level of coordination across disciplines and a strong sensitivity to the environments clients seek to create. Her work reflects mcCallumSather’s belief that interior design plays a critical role in shaping experience, performance, and long-term usability within the built environment.
Muzamal Shafiq has advanced to Senior Technologist. With extensive experience across residential, commercial, healthcare, and retail projects, Muzamal plays a key role in translating design intent into precise and buildable documentation. His expertise in regulatory processes, consultant coordination, and technical detailing supports the firm’s commitment to delivering projects that are not only well-designed, but also resilient, compliant, and operationally sound.
Shyam Koyyana has advanced to Intermediate Mechanical Designer. Shyam brings strong technical skills in mechanical systems design, supporting the coordination of HVAC, plumbing, and automation systems across a range of facility types. His collaborative and detail-oriented approach contributes directly to mcCallumSather’s integrated model, where architectural and mechanical thinking are developed in parallel to reduce risk and improve performance outcomes.
David Kotewicz has advanced to Associate, Architect. David brings a highly organized and research-driven approach, with experience spanning affordable housing, mass timber developments, mixed-use projects, and private residential work. His advancement reflects the firm’s emphasis on leadership grounded in accountability, technical clarity, and long-term engagement across complex delivery models.
Nathalie Desrosiers has advanced to Associate, Heritage Lead. With more than 35 years of experience and over 1,500 heritage projects, Nathalie provides strategic leadership in adaptive reuse, heritage assessments, and context-sensitive urban design. Her work exemplifies mcCallumSather’s approach to sustainability as stewardship, where continuity, cultural value, and innovation intersect in projects that bridge past and future.
“These advancements are not just about individual achievement,” said Drew Hauser, Director, Board Chair at mcCallumSather. “They reflect the collective strength of our teams and our belief that strong practice is built through shared responsibility, mentorship, and integrated thinking. Our people are central to how we collaborate, how we guide clients, and how we continue to deliver meaningful, sustainable outcomes.”
In 2026, mcCallumSather’s firm-wide focus continues to centre on practice intelligence; how teams work together across disciplines, how decisions are made under real-world constraints, and how sustainability is embedded as an operating system rather than a standalone ambition. Investing in leadership at every level ensures the firm remains positioned to support clients with clarity, integrity, and long-term accountability.
