Senior HR Generalist

We're a business navigating a period of real change, and we know that lasting progress is only possible when the people foundations underneath it are solid. We're looking for a Senior HR Generalist who takes genuine pride in getting things right. Someone who understands that brilliant HR is built on consistent, best-practice processes, trusted relationships, and a deep commitment to the experience people have at work.

This is a hands-on, end-to-end generalist role. You’ll be the primary HR contact for our UK and EU population of around 100 people, partnering closely with managers and employees across the full employee lifecycle; from the moment someone accepts an offer to the day they leave, and everything in between. The ideal candidate is a proactive HR professional with strong knowledge of employment practices, employee relations, payroll administration, and HR operations, comfortable handling operational HR responsibilities in a fast-paced, change-rich environment.

• HR Operations & Compliance
  • Maintain accurate employee records and HR documentation
  • Ensure compliance with UK labour laws, company policies, and regulatory requirements
  • Support audits, reporting, and HR metrics tracking
  • Assist with policy creation, implementation, and updates
  • Manage visa applications and maintenance of sponsored employees
• Talent Acquisition & Onboarding
  • Partner with hiring managers to support end to end recruitment activities and hiring processes in the UK and EU to ensure the acquisition of top talent
  • Coordinate onboarding and orientation programs for new hires in UK and EU
  • Help improve employer branding and candidate experience initiatives
  • Maintain and build relationships with recruitment agencies, ensuring up to date PSL which are fit for purpose
• Compensation, Benefits & Employee Experience
  • Support benefits administration and employee inquiries
  • Administer and oversee monthly payroll in partnership with Mexico Service Centre, including:
  • Manage payroll reporting for EE shares, pension, healthcare schemes and internal finance reporting
  • Oversee annual reporting of P11D’s, P60’s, P45’s, and other HMRC requirements
  • Administer all benefits including annual renewals, as well as the evaluation and research of market trends and proposing potential changes based on employee needs
• Employee Relations & HR Support
  • Serve as a trusted advisor to managers and employees on HR policies, procedures, and workplace matters
  • Handle employee relations issues, investigations, conflict resolution, and disciplinary processes in line with company practices
  • Support performance management processes, including reviews, coaching, and development planning
  • Act as point of contact for general inquiries
• Learning & Organizational Development
  • Manage and oversee atgCareers page and ATG Learning Academy programme
  • Collaborate with internal subject matter experts to design interactive courses to be delivered internally
  • Establish robust tracking mechanisms to measure participation, progress and outcomes of Academy courses, utilising feedback to drive improvement
  • Collaborate with Head of HR on developing and hosting Manager Training Sessions
• Employee Experience
  • Assist in driving employee engagement, wellbeing, and retention initiatives in local offices in UK and EU
  • Support in the administration of the annual engagement survey and pulse surveys
  • Partner with Office Manager on office activities, like monthly socials, summer/winter parties and other social/well-being initiatives
  • Support and partner with stakeholders on global and regional newsletters

• A role with genuine breadth: no two days will look the same, and your remit will grow as you do.
• Real proximity to the business: you’ll be a visible, valued part of the team, not a back-office function.
• The chance to shape how we do HR, not just maintain what already exists.
• A supportive environment where good ideas are welcomed and people are treated as adults.

• Required
  • Bachelor’s degree in Human Resources, Business Administration, or related field
  • 5–8+ years of generalist HR experience
  • Strong knowledge of UK employment law and HR best practices
  • Experience handling employee relations and performance management matters
  • Excellent interpersonal, communication, and problem-solving skills
  • Ability to manage confidential information with discretion
  • Proficiency with HRIS systems and data analysis tools
  • Accuracy and attention to detail
  • Strong customer service ethos and proven resilience
  • Excellent interpersonal and communication skills (both written and verbal)
  • Strong initiative and ability to pro-actively recommend improvements to HR processes & services
  • A positive, adaptable, and professional working attitude is essential
• Preferred
  • CIPD qualified (Level 5 or above) or working towards chartership
  • Exposure to German HR practices
  • Experience supporting organizational change initiatives

We recognise that not every candidate will tick every box. If you have strong generalist HR experience and a genuine passion for the people side of a growing tech business, we’d love to hear from you.

Employment Type: Permanent

Duration: Permanent

Business Name: ATG UK

Function Name: Human Resources