GTC Recruitment
HR Advisor

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HR Advisor – 12-Month Contract
Location: Porton Down, Salisbury – 3 days per week on site
Contract: 12 months
IR35: Inside IR35
Rate: £373/day Umbrella
Clearance: Active SC Clearance
We are currently seeking an experienced HR Advisor to join a high-profile public-sector organisation based at Porton Down, Salisbury, on an initial 12-month contract.
This is an excellent opportunity for an HR professional with strong employee relations, HR advisory and stakeholder management experience to provide first and second-line HR support across the organisation.
The Role
As an HR Advisor, you will provide practical and professional HR advice to employees, line managers and senior stakeholders across a broad range of people-related matters.
Your responsibilities will include:
- Providing first and second-line HR advice and guidance.
- Supporting managers and employees with HR policies, procedures, leave, payroll and benefits queries.
- Advising on disciplinary, grievance and employee relations matters.
- Acting as an escalation point for complex HR issues and helping to resolve them effectively.
- Maintaining accurate HR records and employee documentation.
- Using HR information systems to manage employee records and HR processes.
- Preparing HR reports, management information and metrics.
- Supporting recruitment, including job descriptions, interview coordination and onboarding.
- Supporting Learning & Development processes and employee engagement initiatives.
- Working with stakeholders on organisational change and wider HR projects.
- Ensuring HR activity complies with employment legislation, data protection and organisational policies.
- Identifying opportunities to improve HR processes and service delivery.
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About You
We are looking for someone with:
- Strong experience providing 1st and 2nd line HR support.
- Proven employee relations experience, particularly disciplinaries and grievances.
- Good knowledge of UK employment law, HR policies and compliance.
- Experience working with HR information systems.
- Excellent communication and stakeholder management skills.
- Strong organisational skills and attention to detail.
- Experience supporting recruitment and onboarding.
- The ability to handle confidential and sensitive information professionally.
- A proactive approach to problem solving and continuous improvement.


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Experience within a Civil Service or wider public-sector HR environment would be highly desirable, as would CIPD membership/qualification or equivalent HR experience.
Mandatory Requirements
Due to the nature of the role, candidates must:
- Hold active SC Security Clearance.
- Be a sole UK national.
- Be able to work 3 days per week on site at Porton Down, Salisbury.
- Be available for the full 12-month contract.
- Be willing to work Inside IR35.
There is no flexibility on site attendance, rate or clearance.
If you are an experienced HR Advisor with strong employee relations and stakeholder management experience and meet the mandatory security requirements, we would be keen to hear from you.
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