Senior HR Business Partner (Fixed Term Contract to March 2027) in London

HR professionals – you're vital in our fight against cybercrime. At Mimecast, we protect the world's businesses from cyberattacks. It's fast-moving, high-stakes work – and our people make it possible. We're looking for a Senior HR Business Partner to join us on a fixed-term basis, partnering with our global Product function from our London office.

You'll work directly with the Chief Product Officer and their leadership team, while providing broader HR support across EMEA. This is a role for someone who thrives at the intersection of strategy and execution – equally comfortable influencing a C-suite leader and navigating a complex ER case.

What you'll do

• Partner with the CPO and Product leadership team as a trusted advisor on all people matters – from talent and performance to organisational design and change.
• Lead on employee relations across EMEA, managing cases from start to resolution with sound judgement and knowledge of local employment law.
• Drive workforce planning and headcount forecasting in partnership with Finance, mapping capability to strategic goals.
• Lead restructuring and change programmes, guiding leaders through complexity and acting as a genuine champion of change.
• Translate global HR programmes into regionally relevant initiatives that land well and reflect local culture.
• Use HR data and analytics to spot trends, surface risks, and shape smarter people decisions.
• Contribute to HR transformation projects and identify opportunities to improve efficiency across people processes.
• Champion AI adoption in HR workflows and help embed a culture of continuous improvement.
• Drive culture and values programmes that keep Mimecasters engaged, motivated, and performing at their best.

What you'll bring

• Substantial HR generalist experience in a complex, matrixed, global environment – you're comfortable working at pace and managing competing priorities.
• Solid knowledge of European employment law and HR practice; CIPD qualified or equivalent experience.
• A proven track record of building credible, trusted relationships with senior leaders and influencing at all levels.
• Sharp analytical skills – you know how to interpret people data and use it to drive better outcomes.
• A hands-on, no-ego working style – you're as happy rolling your sleeves up on day-to-day queries as you are shaping organisational strategy.
• Strong written and verbal communication skills, with the confidence to present ideas clearly and concisely at executive level.
• Resilience, integrity, and the courage to speak up – even when it's not the easy thing to do.

The Mimecast way

We're fast thinking, big acting, and genuinely mission-driven. We offer hybrid working, a culture built on honesty and mutual respect, and the chance to do meaningful work that keeps businesses safe. If cybercriminals have a good day, we work twice as hard to make sure the rest of their days are a nightmare.

Be passionate. Be powerful. Be alive with purpose. Become a Mimecaster.

The base salary range for this position is £60,000- £90,000 (pro rata) plus benefits. This range represents the minimum and maximum new hire compensation for this role. The position may also be eligible for incentive plans and additional benefits, in accordance with company policy and local regulations. Our salary ranges are determined by role, level, and location with individual compensation also dependent on factors such as qualifications, experience, and skills. Final offers will reflect these considerations and may vary accordingly.

We are proud to be an Equal Opportunity Employer. We welcome applications from all backgrounds and particularly encourage those from traditionally underrepresented groups.

Belonging at Mimecast

Cybersecurity is a community effort. That’s why we’re committed to building an inclusive, diverse community that celebrates and welcomes everyone – unless they’re a cybercriminal, of course.

We’re proud to be an Equal Opportunity and Affirmative Action Employer, and we’d encourage you to join us whatever your background. We particularly welcome applicants from traditionally underrepresented groups.

We consider everyone equally: your race, age, religion, sexual orientation, gender identity, ability, marital status, nationality, or any other protected characteristic won’t affect your application.

Due to certain obligations to our customers, an offer of employment will be subject to your successful completion of applicable background checks, conducted in accordance with local law.