HR Administrator


Company:	National Nuclear Laboratory Limited
Salary:	Not specified
Hours:	Full-time
Location:	Warrington, WA3 6AE
Job type:	Contract
Posting date:	21 Sept 2026
Closing date:	12 Oct 2026

Apply for this job

Summary

There's never been a more exciting time to be part of the nuclear sector. New opportunities are being created all the time. At UKNNL, you'll be in the ideal place to capitalise on this momentum, face new challenges and develop a long, successful and meaningful career.

We're an organisation that's here to experiment and push the limits of what's possible. So, if you're keen to excel in your chosen field, this is the place to do it. Because at UKNNL, anything is possible.

Job Description

Embedded into the HR function, we are looking for someone who can provide first line advisory support to our employees and line managers within the business. Working in a team of associates, you will provide HR generalist support to our employees as the first point of contact. If you are a problem solver, can keep a calm head under pressure and you want to be part of rolling your sleeves up and making a considerable impact, this could be the HR role for you.Our people agenda is exciting and challenging, you will have to be ready for a challenge, have the enthusiasm and attitude to want to learn, develop and have some fun and you will be rewarded with not only a great package but by joining a team where you will be valued and appreciated.

As a HR Associate you will play a key role in the HR Support Team; responsible for delivering an excellent level of service to our internal and external customers.

As the first line advisory support to our employees and line managers within the business, you will work with a team of other HR Associates to deliver timely and high-quality assistance as a first point of contact for HR-related queries, including generalist support, recruitment and learning & development. From being involved with process improvements, procedural reviews, the ability to participate in HR projects and supporting our employees through the HR life cycle; this is a varied role that will play a key part in building our HR Support Team to its full potential.

Main Responsibilities

Process documentation and transactions in accordance with service requirements

Organise, maintain and update personnel records in line with GDPR

Preparing HR documents such as employment contracts, contractual changes and guidance for employees

Work with HR data reports and provide HR metrics to our internal customers

Ensuring internal databases are maintained and updated, including our HR Information System, Internal Management System of documents

Providing excellent customer service and being the first line support for HR queries relating received by email and telephone

Provide support across a range of HR processes which include absences, reward, leavers and all other HR tasks

Assist in the full recruitment lifecycle, from job posting, scheduling interviews, liaising with hiring managers to onboarding

Maintain candidate databases and recruitment records in the Applicant Tracking System

Supporting Right to Work and all other pre-employment

Maintain process flows and user guide documentation for HR processes

Participate in project delivery within the HR team

Proactively recommend and implement process improvements

Ensure compliance with and contribute to risk management, governance and assurance processes in HR

Ideal Candidate

Essential Criteria for HR Administrator

Experience of working within HR

Confident in MS Office including Word and Excel in particular

Good organisational skills, with excellent attention to detail

Strong phone, email and in-person communication skills with enthusiasm to deliver excellent customer service

A willingness and determination to learn

Able to work on own initiative and meet deadlines

Experience of using HR Information Systems

Experience of working with Applicant Tracking Systems

Ability to obtain BPSS level security clearance (this includes but is not limited to identity, employment and criminal record checks).

Desirable Criteria for HR Administrator

CIPD qualification or working towards

Experience of working with Business World ERP

Experience of Right to Work checks and reviews

Why join us?

UKNNL isn't just a place where you can do career-defining work that makes a real-world impact. It's also a place where you'll feel appreciated and valued. We're creating an inclusive workplace where everyone is free to be themselves and feel like they belong. We put your wellbeing first, we push you to reach your potential, and we do everything possible to help you feel safe, supported and inspired.

We also offer a range of employee benefits:

Sector leading Family-Focused Policies: celebrate life events, including enhanced maternity and paternity leave and a week off for your marriage.

UKNNL offers attractive pension plans. If you contribute 5%, UKNNL contributes 15%. Alternatively, if you choose not to contribute (0%), UKNNL will still contribute 10%.

Annual Leave: Benefit from 25.5 days of leave, plus 4 extra days to be taken during Christmas shutdown, plus Bank Holidays.

Reduced gym membership with discounts of up to 25% from 3,700 gym and leisure providers across the UK

Company Bonus: Be rewarded for your contributions.

Learning Opportunities: Enhance your skills through excellent development programmes.

Employee Assistance: Access support for personal and professional challenges.

Cycle to Work: Stay active and eco-friendly.

Life Assurance: Ensure peace of mind for you and your loved ones.

Enhanced Sick Pay Benefits: Receive support during illness or injury.

Access to 'Mydiscounts' which has a range of special offers and discounts from more than 200 suppliers, including medical insurance and dental insurance.

Health Care: Health savings plan which allows you to claim money back on visits to the dentist, optician and/or physiotherapist (limits apply).

Apply for this job