Congratulations to the well-earned promotions this year. This group exemplifies the expertise, leadership, and collaborative spirit that define our firm.
Cheers to our team for reaching this milestone and continuing to thrive at RDH!
Principals
Alan Bowden | P.Eng. (Vancouver)
Principal, Specialist – Building Enclosure
Alan is a driving force behind some of RDH’s most technically demanding new construction projects in Vancouver. Bringing a global perspective to enclosure performance and diagnostics, he leads complex design reviews, testing programs, and quality assurance strategies from concept through construction. His depth of expertise, paired with disciplined project oversight, consistently elevates performance outcomes and advances technical excellence across his projects.
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Lubos Hrasko (Vancouver)
Principal, Director of Technology
Lubos leads RDH’s technology vision and strategy, aligning digital systems and platforms with long term goals and operational priorities. A seasoned technology leader, he guides complex digital transformation initiatives across AI, cybersecurity, and data governance, balancing performance, flexibility, and security. Through strategic vision grounded in hands-on execution, Lubos advances scalable innovation and positions technology at the forefront of RDH’s practice.
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Gijsbert Libourel | PE, (Los Angeles)
Principal, Senior Specialist – Facade
Associate Principals
Ian McRobie | P.Eng., PE, LEED AP (Vancouver)
Associate Principal, Specialist
Ian is a mechanical specialist in our Vancouver office, focusing on existing buildings, deep retrofit planning, and integrated project delivery alongside enclosure and energy teams. His experience spans commercial, institutional, education, and healthcare sectors, with expertise across heating, cooling, ventilation, plumbing, and fire protection systems. Ian’s integrated approach helps clients modernize infrastructure while improving performance and long-term resilience.
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Erica Barnes (Toronto)
Associate Principal, Senior Engineer – Building Science
Erica drives complex new construction, renewal, and heritage preservation projects throughout the Greater Toronto Area. In the Toronto office, she guides multidisciplinary teams through building enclosure investigations, repairs, and large-scale rehabilitation efforts across the commercial, residential, and institutional sectors. She is known for aligning technical precision with architectural integrity, helping clients modernize performance while protecting long-term value.
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Amy Montgomery | MASc, P.Eng., CAHP (Toronto)
Associate Principal, Senior Engineer – Building Science
Amy brings a broad and versatile building science practice to RDH, working across high performance new construction and existing building renewals. Her experience spans enclosure design, energy performance, and applied research. Within this wide-ranging practice, Amy is recognized as a leading technical specialist on advanced knowledge of historic building materials, supporting the careful renewal and long term durability of heritage and existing buildings. Her work reflects a deep understanding of how buildings perform over time and a strong commitment to durable, resilient, and well considered design solutions.
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Ashley McManigal | SHRM-CP, PHR (Seattle)
Associate Principal, Director of T&C – US
Ashley is a recognized leader in organizational transformation and is a data-driven people strategist, specializing in designing talent strategies that enhance employee engagement, retention, leadership development, and long-term growth. She drives organizational success by fostering resilient, high-performing teams and delivering strategic insight at every level. With expertise spanning organizational design, total rewards, and change leadership, Ashley delivers measurable impact by combining analytical rigor with a human-centered approach.
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Samuel Chipperfield (Portland)
Associate Principal, Specialist
Samuel is a key leader in RDH’s Portland office, bringing deep expertise across all phases of building science projects, from rehabilitation to new construction. In addition to championing business development and operational leadership, he delivers technical precision and strategic problem-solving on complex building challenges. His work consistently delivers durable, high-quality outcomes that strengthen client trust and project performance.
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Cameron Chorney | PE (Los Angeles)
Associate Principal, Senior Engineer – Building Enclosure
Cameron plays a pivotal role in RDH’s growth across Southern California, specializing in high-performance building enclosures that meet rigorous environmental and regulatory standards. His experience spans residential, commercial, and institutional projects through design and construction, with a strong focus on durability, efficiency, and long-term performance.
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Michael Browne | HERS Rater, Phius MF Verifier (Boston)
Associate Principal, Senior Specialist – Building Enclosure
Michael is a recognized leader in high-performance building delivery, specializing in Phius-aligned multifamily projects and large-building airtightness strategies. In RDH’s Boston office, he leads the Phius Verification and Whole Building Air Leakage Testing practice, setting strategic direction and elevating Energy & Climate services. Known for his rigorous, field-driven approach, Michael builds high-performing teams and advances industry standards in diagnostics, verification, and drone-enabled inspections to help projects achieve measurable performance outcomes at scale.
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Andrew Steingiser | RA, CPHC, LEED AP (Boston)
Associate Principal, Specialist
As the leader of RDH’s Passive House practice in Boston, Andrew serves as an early-phase design partner, grounding rigorous building science principles in a deep understanding of the architectural process and its competing complexities. Beyond deciphering the nuances of the Mass Stretch and Opt-in codes, he translates client goals into scalable, climate-resilient solutions. By bridging the gap between design intent and technical standards, Andrew provides the insight and foresight necessary to future-proof projects across the built environment while ensuring a predictable path to compliance.
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Associates
Eric Watters | P.Eng. (Victoria)
Associate, Project Engineer – Building Enclosure
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Melissa Morlidge | MBSc, ASHRAE CDP (Toronto)
Associate, Senior Consultant – Building Science
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Luke Betteridge | PE, SPRAT L3 (Seattle)
Associate, Senior Engineer
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