Senior Associate HR

compensation, and employee changes. Support the development and maintenance of clear, practical people policies, templates, workflows, and guidance that managers can actually use. Act as a first point of contact for our employees in UK and answer questions on onboarding,

benefits, policies, and practical people matters. Partner with Talent, IT, Finance, Security, Facilities, and hiring managers to make sure employee transitions are smooth from offer acceptance through the employee lifecycle. Support data reporting and dashboards for headcount, onboarding, probation, performance actions, absence, turnover, and people operations. Proactively identify and improve broken or slow processes. Support a high-performance culture and help build scalable people operations without importing corporate bureaucracy.

Who you are A hands-on People or HR Associate with experience supporting UK employees in a start-up or fast-moving business. Strong working knowledge of UK HR fundamentals, including contracts, right-to-work, employee records, probation, absence, policy administration, and basic employment-law considerations. Highly organised, detail driven and practical. Able to manage multiple moving parts across onboarding, employee changes, probation reviews,

benefits and manager requests without dropping detail. Experienced using HR systems, ideally HiBob (e.g. SAP successfactors, or similar) and confident maintaining accurate people data. Strong written communication skills. Able to work with senior leaders, managers, engineers, and new starters with confidence and professionalism. Discreet, mature and trusted with confidential people matters. Proactive by default. Comfortable operating in a high-performance environment where standards are high, pace is fast, and people decisions matter. Experience in aerospace, defence, engineering, manufacturing, technology, or another high-consequence environment preferred. Bachelors degree, or similar professional qualification in HR, Business or similar subject is preferred. Motivated by building a people function that increases company velocity, protects standards and helps exceptional people do their best work. What success looks like New starters are onboarded cleanly, quickly and with no avoidable confusion. HiBob and people records are accurate, complete and audit-ready. Probation, performance, and people-process deadlines are tracked and followed through. UK HR administration is compliant, fast, and reliable. \n Due to the nature of the work with the UK MoD, applicants must be a British Citizen, or a dual national holding British citizenship, and eligible for UK Security Clearance and where required, Developed Vetting. What we offer A mission-driven environment with the opportunity to work on one of Europe’s most consequential defence challenges, with direct impact on sovereign capability and security. Daily collaboration with top experts across engineering, operations, defence, and business functions, with real opportunity to learn from the best, contribute, and grow. High ownership and autonomy; no micromanagement, just clear objectives and accountability for outcomes. A fast-paced environment where good ideas are implemented quickly and broken processes are fixed rather than tolerated. A culture that values clarity, integrity, excellence, and direct feedback. Competitive

compensation and real share options aligned to responsibility and impact, not tenure or hierarchy. At Hypersonica, every hire raises the bar. We are deliberately small, intensely capable, and deeply mission-driven. If this role feels like a strong fit, or if you believe you bring something exceptional that goes beyond the description, we encourage you to apply. Hypersonica is an equal-opportunity employer and assesses candidates solely on merit, capability, and potential. Due to the nature of the work with the UK MoD, applicants must be a British Citizen, or a dual national holding British citizenship, and eligible for UK Security Clearance and where required, Developed Vetting. What we offer A mission-driven environment with the opportunity to work on one of Europe’s most consequential defence challenges, with direct impact on sovereign capability and security. Daily collaboration with top experts across engineering, operations, defence, and business functions, with real opportunity to learn from the best, contribute, and grow. High ownership and autonomy; no micromanagement, just clear objectives and accountability for outcomes. A fast-paced environment where good ideas are implemented quickly and broken processes are fixed rather than tolerated. A culture that values clarity, integrity, excellence, and direct feedback. Competitive

compensation and real share options aligned to responsibility and impact, not tenure or hierarchy. At Hypersonica, every hire raises the bar. We are deliberately small, intensely capable, and deeply mission-driven. If this role feels like a strong fit, or if you believe you bring something exceptional that goes beyond the description, we encourage you to apply. Hypersonica is an equal-opportunity employer and assesses candidates solely on merit, capability, and potential.

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