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Senior People Business Partner

Muon Space· People
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Hybrid (San Jose, CA)$173k - $191kfull-timePosted 3w ago

About the role

Founding Senior People Business Partner responsible for driving people strategy and end-to-end people operations in a fast-paced, hybrid environment in San Jose, CA. Owns strategic design and tactical implementation, partnering with directors and managers to develop and scale Muon's people programs.

Responsibilities

  • Architect and implement critical People Ops initiatives—from new manager training to talent review cycles—from initial design through final launch.
  • Continuously evaluate workflows to eliminate operational friction across a distributed workforce, building scalable solutions that enable growth and mitigate organizational risks.
  • Partner directly with directors and frontline managers to build manager capability, serving as a warm, grounded coach on leadership best practices.
  • Design and deliver structured manager development programs that equip leaders to manage high-performing teams, navigate complex performance management, and deliver constructive feedback.
  • Guide and upskill managers on policy execution through clear, accessible documentation and hands-on guidance.
  • Act with high autonomy to identify, diagnose, and resolve company culture vulnerabilities and complex personnel challenges before they impact the business.
  • Handle complex employee relations, performance discussions, and sensitive workforce issues with extreme discretion, empathy, and integrity.
  • Use analytical judgment and contextual reasoning to solve ambiguous problems where precedent may be limited.
  • Serve as a visible anchor for Muon’s values, fostering a workplace culture anchored in continuous growth, feedback, warmth, and mutual respect.
  • Provide a helpful, empathetic, and approachable point of partnership for employees at every level, ensuring questions and concerns are met with clarity and care.

Qualifications

  • 6–10+ years of progressive HRBP or People Operations experience in fast-paced environments, with a proven track record of full-stack ownership (both strategic design and tactical implementation).
  • Demonstrated success designing, facilitating, and driving manager development initiatives and coaching leadership cohorts.
  • Proven ability to translate broad business goals into actionable project roadmaps and execute independently with minimal direction.
  • Outstanding verbal and written communication skills with a natural approachability, high emotional intelligence, warmth, and a customer-service mindset.
  • Exceptional judgment when navigating ambiguous employee relations matters, maintaining absolute confidentiality and security around sensitive personnel data.
  • Hands-on experience increasing adoption and effectiveness of modern HR systems (Rippling, Lattice) and building out accessible and clear documentation (Google Workspace, Confluence).

Skills

Required:People Operations strategyManager development & coachingEmployee relationsHR systems (Rippling, Lattice)Documentation & communication

Benefits

  • equity grant
  • comprehensive benefits package including medical, dental, and vision insurance
  • 401k retirement plan
  • short & long term disability and life insurance
  • three weeks paid vacation
  • 12 paid holidays
  • unlimited sick time
  • paid parental leave
Last updated Oct 10, 2026. Interested? Apply on the company site.

About Muon Space

The Mission Foundry — designing, building, and operating high-performance satellite constellations for National Security, civil, and commercial customers.

Design, build, and operate mission-optimized satellite constellations with Muon Space.

Mission FoundryMission DesignSpacecraft PlatformsPayloads & Data ProductsOrbital AIConstellation ProductionManaged Orbital Services
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