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HR Manager

Mesa - Boulder, CO, United States - In-office - posted 2026-09-17

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Mesa Quantum is building next-generation quantum sensing and Position, Navigation, and Timing (PNT) technologies for defense, critical infrastructure, telecommunications, and autonomous systems. This is a builder's role—you'll own HR and People Operations end-to-end, from offer letter to offboarding, while standing up processes, systems, and documentation from scratch. You'll be the go-to person for employees and leadership, responsible for the full employee lifecycle including onboarding, offboarding, records, and documentation. You'll design and document scalable HR workflows, own the HRIS and keep employee data clean and current, manage performance processes and employee relations support, and ensure company policies and employee handbook compliance across operating jurisdictions. You'll also coordinate payroll and benefits administration, and proactively identify and fix gaps before they become problems. Beyond core HR, you'll pick up adjacent operational work as the business needs it: procurement, vendor management, software license tracking, facilities, and general administrative support for leadership initiatives. Success means employees have a smooth, well-supported experience at every stage; leadership has accurate people data when they need it; and HR never becomes a bottleneck as the company scales. Mesa Quantum is a fast-growing deep-tech startup backed by leading investors and government partners. You'd be the first real owner of HR, building the systems and practices that shape how the company hires, supports, and retains people as it scales. This is high-ownership, high-visibility work with direct impact at a company solving genuinely hard technical problems. **Requirements:** - 5+ years in HR/People Ops with real ownership of core responsibilities, not just administrative support - Track record of building HR processes from scratch, not just executing existing ones - Strong grasp of employee lifecycle management, compliance basics, and confidentiality norms - Comfort with ambiguity and genuine willingness to be hands-on outside traditional HR when needed - Excellent judgment, follow-through, and communication skills **Nice to Have:** - Background in a startup, deep tech, engineering, or technical environment - Multi-state HR experience, payroll/benefits administration, HRIS/ATS platforms - Experience with vendor, procurement, or facilities management - HR-related degree or equivalent experience

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