HR Advisor in London

Brook Green Supply are an independent B2B energy supply company. You will be working alongside a vastly experienced team who have operated in the energy industry for many years, providing a fantastic career opportunity for a determined, flexible, and driven individual, with personal development and progression aligned to the continued growth and success of the business.

The HR Advisor will be visible, approachable and highly organised, providing essential coordination across the HR function while delivering first-line support to the business. You will support day‐to‐day HR operations, manage core HR processes and payroll administration, and contribute to people initiatives that promote a positive, values‐driven culture. This role is ideal for an experienced HR Coordinator or HR Advisor looking to further develop generalist skills.

• Provide first‐line HR advice and guidance to employees and team leaders on a wide range of people matters, escalating more complex queries to the HR Manager or HR Business Partner where appropriate.
• Act as the primary coordinator for HR administration, maintaining accurate employee records, keeping our HRIS (HiBob) updated, preparing contracts and letters, tracking probation and key HR milestones, and ensuring excellent employee lifecycle management.
• Own and administer end‐to‐end payroll preparation, collating monthly data, liaising with Finance, and ensuring accuracy in all payroll‐related changes.
• Manage pension and benefits administration, including processing joiners and leavers, maintaining accurate records, responding to employee queries, and coordinating with external benefits providers and brokers to ensure smooth and compliant service delivery.
• Support positive working relationships across the organisation, meeting regularly with team leaders to understand local needs, surface concerns, and identify opportunities for greater collaboration.
• Contribute to performance and development processes, including objective‐setting, probation reviews and performance check‐ins, providing guidance to team leaders and ensuring documentation is completed accurately and on time.
• Support the HR Manager and HR Business Partner with cyclical HR activities such as the annual performance review, pay review and bonus process.
• Assist with employee relations casework, including investigation preparation, note‐taking, and gathering documentation, ensuring issues are escalated appropriately.
• Coordinate training and development logistics.
• Provide occasional support and leave cover to the Resourcing Partner.
• Ensure an excellent onboarding process for new starters from offer paperwork preparation, to system setup, and regular contact to keep our future employees excited and engaged.
• Prepare regular and ad‐hoc people reports, supporting analysis that informs recommendations and decisions across the HR team.
• Maintain HR policies and processes, supporting updates, ensuring compliance with employment legislation, and contributing to continuous improvement and simplification initiatives.
• Provide hands‐on support for HR projects, working with the HR Manager and HR Business Partner on improvements to processes, systems, and employee experience.

• Proven experience in a generalist HR Coordinator or Advisor role, preferably within a fast‐paced, high‐growth or entrepreneurial environment;
• Previous experience administering payroll and benefits;
• Good working knowledge of UK employment law and HR best practice;
• Strong organisation and coordination skills, with the ability to manage multiple priorities and maintain high attention to detail;
• Experienced in compiling and analysing people reports;
• Confident communicator with excellent interpersonal and influencing skills and the ability to build trusted relationships;
• Ability to work autonomously, use initiative, and exercise sound judgement;
• Team‐oriented and flexible, with a hands‐on approach to problem‐solving and service delivery.

This role offers real opportunities for growth, collaboration, and impact. You will work closely with experienced industry professionals in a supportive environment that values initiative, development, and teamwork. You will also have the flexibility to balance office collaboration with independent working time.

We also offer a comprehensive benefits package, including:

• 25 days annual leave plus Bank Holidays
• Flexible working arrangements
• Private health care
• Company pension scheme
• Life and medical insurance, eyecare scheme
• Employee Assistance Programme
• Cycle to Work scheme
• Family‐friendly policies
• Recruit and Reward scheme
• Access to Perkbox benefits platform

Even if you don’t tick every single box, we would still love to hear from you. If you bring enthusiasm, curiosity, and a willingness to learn, we will support your growth and help you succeed.

If you have any questions about the role or the recruitment process, our team will be happy to help. If you require any specific accommodations during the interview process, please let us know and we will do our best to support you.