HR Assistant – FTC 12 months (Maternity Cover)

THE OPPORTUNITY
An exciting opportunity has become available to be part of our fast-growing team, and to be a key part of the mediasense HR function. This role provides an outstanding opportunity to join one of the UK’s fastest growing media services companies and will provide an ambitious individual with valuable experience for progression and development.

THE COMPANY

mediasense is a global, independent advisor that brings the clarity, connection and confidence modern marketers need to fuel growth. We help marketers eliminate waste and maximize the impact of their most significant investments at scale. Our ambition is to define and own an entirely new category – recognized as the world’s most trusted, independent and impactful marketing advisor. We do this by elevating how clients operate, how agencies deliver, how platforms perform, and how all parts of the ecosystem connect. Because progress doesn’t happen in isolation, it takes alignment, intelligence, and trust. That’s what we enable. That’s what we stand for. That’s Unified Marketing Intelligence.

mediasense is designed around how we help marketers optimize and transform through best-in-class structure and governance (Organization), partners and platforms (Ecosystem), governance and controls (Assurance), and measurement and effectiveness (Science). We have the proven ability to effectively support large, complex organizations and deliver multiple projects simultaneously. As evidenced through our strong track record with clients, we pride ourselves on the consistent high quality of service delivery and the ability to accelerate transformation and growth.

mediasense and has over 200 employees across London, New York, Singapore and New Delhi.

THE ROLE

As a HR Assistant (FTC – 12 months, Maternity Cover), you will support the day-to-day HR operations across the full employee lifecycle. This is a generalist role designed to provide administrative, coordination, and employee experience support. You’ll assist with onboarding, payroll, recruitment logistics, training admin, employee engagement, and internal communications.

This role is ideal for someone who enjoys variety, people interaction, and is keen to grow across different HR disciplines.

Key responsibilities include:

• Create welcome packs and onboard new starters in BambooHR
• Draft confirmation letters for promotions or role changes
• Post job adverts and schedule interviews with managers
• Coordinate interview logistics with candidates and agencies
• Provide daily payroll support via Finance and Payroll inbox
• Manage employee benefit queries (pensions, insurance) and liaise with vendors
• Organize employee events (birthdays, anniversaries, initiatives)
• Assist in end-to-end visa and sponsorship processes
• Maintain HR intranet pages and post internal communications
• Support HR policy and handbook updates with version tracking
• Document meeting minutes and follow up on actions
• Provide backup support for Learning & Development during absences
• Coordinate Keeping In Touch (KIT) maternity days and support the maternity process
• Track completion of performance reviews
• Perform basic audits for lifecycle events (promotions, rewards)
• Track employee milestones, rewards, and communications
• Assist with HR announcements and internal comms
• Contribute to ad hoc HR projects
• Generate monthly/quarterly HR analytics (turnover, DEI, attendance)

THE ESSENTIALS

We’re looking for someone who is organised, approachable, and eager to grow. You’ll interact with people across all areas of the business, so strong communication skills, attention to detail, and a positive, can-do attitude are essential.

* Previous HR Experience is a must *

Ideally, you’ll have:

• • Experience in an HR administrative, assistant, or coordinator role
  • Understanding of day-to-day HR processes and basic UK employment law
  • Experience using HR systems (e.g., BambooHR)
  • Confidence with Microsoft Office (Word, Excel, Outlook)
  • Excellent attention to detail and ability to manage multiple priorities
  • A proactive, solution-focused mindset with process improvement ideas
  • Professional, friendly manner with discretion in handling confidential information
  • A genuine interest in people and workplace culture