Optomechanical Design Engineer

Location: Ottawa, ON (on-site) Employment type: Full-time permanent Salary range: $75,000 – $145,000 CAD per year, commensurate with experience About Q-Block Computing: Q-Block Computing builds quantum systems that operate in the real world. The company develops quantum timing, quantum-secure communications, and quantum computing platforms engineered for the performance, reliability, and environmental resilience that mission-critical applications demand — systems designed to be deployed, maintained, and trusted by operators who cannot afford ambiguity about whether the technology works. The long-term vision is deeper than any single platform. Q-Block is pursuing a mission to decode Nature's foundational model — to build instruments of sufficient precision and coherence that they become tools for understanding the physical universe at its most fundamental level. Commercialization and science reinforce each other by design. About this role: The Optomechanical Design Engineer will own the mechanical and optomechanical design of Q-Block's quantum hardware platforms, carrying systems from laboratory prototype through to fieldable, environmentally hardened product. The work spans precision optical mount design, enclosure packaging, thermal management, vibration and shock assessment, tolerance analysis, and the manufacturing coordination that turns a design into a delivered article. The successful candidate is a mechanical engineer who thinks at the sub-micron level when the optics demand it and at the field-deployment level when the environment demands it, and knows how to hold both pictures in mind at once. They are equally at home in CAD, in a simulation environment, and on the shop floor reviewing a first article with a machinist. The role collaborates closely with the Optical Engineer, the electronics team, and the firmware team, and is responsible for the physical embodiment of systems that need to work — not just demonstrate — under real operational conditions. Responsibilities Design precision optomechanical mounts, flexure assemblies, lens housings, and beam path structures that maintain sub-micron and sub-millirad alignment stability under thermal and vibration loads. Design enclosures and packaging for quantum hardware modules, balancing optical access, thermal dissipation, electromagnetic shielding, weight, and serviceability. Develop 3D CAD models and assembly layouts of complete hardware modules integrating optical, electronic, and mechanical subsystems in SolidWorks, Inventor, or equivalent. Conduct thermal analysis (conduction, convection, radiation) of enclosed optical-electronic assemblies using ANSYS, COMSOL, SolidWorks Thermal, or equivalent; design thermal management solutions including heat sinks, TEC interfaces, and airflow paths. Perform tolerance stack-up analysis for optical assemblies; ensure alignment budgets are achievable given manufacturing tolerances, thermal drift, and vibration inputs. Assess…