Hr Administration à Grande-Bretagne

Senior HR Advisor Remote (Part-Time, Fixed-Term) Up to £50,000 (pro-rated for part-time)
Hours: 30 per week, across 4 or 5 days Contract: 14-month Fixed Term

At TwinStream, we bring technical excellence and exceptional service to our clients across government and industry. Founded in 2019 by engineers passionate about solving complex cross-domain challenges, we ve grown into a dynamic consultancy where people are at the heart of everything we do.

Our teams work both remotely and on client sites, but we re united by a culture that values flexibility, collaboration, and continuous improvement.

The Senior HR Advisor opportunity:

We re looking for a Senior HR Advisor to join our growing People team. This is a hands-on, varied role where you ll be the go-to expert for HR operations, employee lifecycle processes, and compliance.

If you enjoy shaping processes, building HR systems from the ground up, and making a tangible impact in a scaling organisation, this is the role for you.

Why join us?

• Competitive pension plan 8% employer contribution
• Private medical healthcare including dental & optical for you and your family
• Learning & development autonomy to drive your own career growth
• Flexible working integrate work with life seamlessly
• Electric vehicle scheme salary sacrifice for sustainability
• Generous holiday 28 days + bank holidays
• Life assurance & cycle-to-work scheme
• Team events summer socials, Christmas parties, and quarterly get-togethers

Key Responsibilities of the Senior HR Advisor:

• Acting as the first point of contact for employee queries, providing expert guidance.
• Drafting contracts, managing changes, and supporting smooth onboarding and offboarding.
• Coordinating compliance checks and ensuring adherence to UK employment law and GDPR.
• Managing and improving HR systems and people data, providing insights to the business.
• Administering employee benefits and supporting cross-functional processes with Finance, IT, and Admin.
• Leading process improvements in HR operations, including sourcing and implementing a new HRIS.
• Partnering with the CPO on people-focused projects to support business growth.

About you:

• Strong experience in HR operations or generalist roles, ideally in a start-up or scaling business.
• Solid knowledge of UK employment law and HR compliance.
• Confidence working with HR systems (e.g. BambooHR, HiBob or similar).
• A detail-oriented, process-driven mindset with the ability to streamline workflows.
• Excellent communication skills and discretion when handling sensitive information.

Important to know:

Due to the nature of some of our clients, this role is subject to successful completion of a security screening process.

Ready to shape the future of HR at TwinStream?
Apply now and help us build a people experience that truly makes a difference.