Senior HR Advisor

Twinstream Limited; Cheltenham; Remote; GBP 40,000 - 50,000; Part time

Job summary

A dynamic consultancy seeks a Part-Time Senior HR Advisor to lead HR operations, ensuring compliance with UK laws. This hands-on role balances remote and on-site work with a focus on building impactful HR processes in a growing organization. The ideal candidate possesses solid HR experience and communication skills. Attractive benefits include a competitive pension, private healthcare, and generous holidays.

Benefits

Competitive pension plan (8% employer contribution)

Private medical healthcare

Learning & development autonomy

Flexible working

Electric vehicle scheme

Generous holiday (28 days + bank holidays)

Life assurance & cycle-to-work scheme

Team events and socials

Qualifications

• Strong experience in HR operations or generalist roles.
• Solid knowledge of UK employment law and HR compliance.
• Excellent communication skills and discretion when handling sensitive information.

Responsibilities

• Acting as the first point of contact for employee queries.
• Drafting contracts and managing onboarding/offboarding.
• Coordinating compliance checks with UK laws.

Skills

HR operations experience

Knowledge of UK employment law

HR systems proficiency

Communication skills

Detail-oriented mindset

Tools

BambooHR

HiBob

Job description

Overview

Senior HR Advisor Remote (Part-Time, Fixed-Term) Up to GBP50,000 (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.