Senior HR Co-ordinator (Part Time)

Part-time Senior HR Coordinator role covering 0.8 FTE / 4 days per week. Closing date: 8 February 2026.

NATS is the UK’s leading air navigation service provider, handling over 2 million flights each year. It provides air traffic control services from two control centres supporting airports all around the UK, as well as a wide range of commercial solutions to over 30 countries internationally. Our people are at the heart of our purpose to advance aviation and keep the skies safe.

We are looking for a highly organised and detail-focused Senior HR Coordinator to manage a wide range of transactional HR activity across a complex and fast-paced environment. You will take responsibility for processing employee movements, calculating pay changes, meeting payroll deadlines, managing high volumes of HR queries, and ensuring the accuracy of all contractual, payroll and system updates.

Working within our busy and friendly HR department, you will work in accordance with legislation, best practice, and NATS policies, procedures, and agreements. This role requires a quick learner who can confidently navigate complex HR policies and processes, apply rules consistently, and deliver excellent customer service.

• Manage a large volume of employee and manager queries via the HR case management system, ensuring timely, accurate, and high-quality responses.
• Assist managers with submitting HR transactions in the HR system (SuccessFactors) by offering clear process guidance, identifying and resolving technical issues, and ensuring changes are raised correctly to avoid delays or errors.
• Provide clear, consistent guidance on NATS policies, procedures and employee terms, in line with NATS agreements and grade structures.
• Process updates in the HR system (SuccessFactors) and generate contractual documentation with a high level of accuracy.
• Maintain employee records in line with GDPR and data quality standards.
• Calculate and maintain annual leave quotas and resolve complex leave calculations and queries.
• Work to strict monthly payroll deadlines, ensuring all changes are processed accurately and on time.
• Calculate pay changes, allowances, and adjustments in line with the employee handbook and NATS agreements.
• Administer changes to terms and conditions of employment, ensuring precision and compliance.
• Conduct peer checks of team members’ work to ensure accuracy, compliance, and consistency across the team.
• Identify opportunities for process improvements and contribute to projects and team meetings.
• Develop specialist knowledge in key employee lifecycle areas (e.g., leave of absence, employee movements) and help to maintain associated guidance and documentation.

• Previous experience in a HR function with applied knowledge of HR policies, procedures, and transactional processes.
• Demonstrated ability to manage high workload volumes, conflicting priorities, and tight deadlines.
• Exceptional attention to detail, with the ability to interpret complex rules and agreements accurately.
• Strong numerical skills and confidence in applying pay rules and calculations.
• Excellent communication skills—approachable, professional, and able to deliver clear guidance.
• Proficient in MS Office (Outlook, Word, Excel, SharePoint) and comfortable using HR/Payroll systems. Experience with SuccessFactors is beneficial but not essential.
• Ability to maintain confidentiality, apply discretion, and work with empathy.
• A strong team player with a proactive, solution-focused approach.
• Quick learner who can adapt to new systems, processes, and complex employment arrangements.

We are proud to offer a fantastic total reward package to help you thrive both personally and professionally. If you share our passion to advance aviation and keep the skies safe – we would like to hear from you whatever your age, sex, race, faith, sexual orientation, gender identity, gender expression, visible or invisible disability. Individuals that bring different perspectives, skills, life experiences and backgrounds help us be at the forefront of our industry.