HR Manager (m/w/d)
Über uns Gestalte mit uns die Zukunft des Umweltingenieurwesens. SIERA vereint führende Unternehmen im Umweltingenieurwesen und bringt Mensc…
Job Type: Permanent/Fixed-Term Contract
Location: Halesowen, Birmingham
Hours: 40 hours per week
Competitive Salary & Benefits
At Hayley Dexis we’ve built-up our reputation over the course of the last five decades with stock, service and people at the core of everything we do.
We are entering an exciting period of growth and our 1300 people, doing things the “Hayley Way” along with industry leading customer service are central to our success.
About the HR Manager
As the HR Manager, you’ll join a growing team and play a central role in delivering an exceptional people experience. This is a high-impact position responsible for driving operational excellence, maintaining legislative compliance, and enabling a high-performance culture across the organisation.
Reporting to the UK HR Director, you will lead key HR activities, oversee HR operations, and act as the go-to expert on HR processes, systems, and employment legislation. You will also have a small number of direct reports, with the opportunity to shape and influence our expanding HR function.
What You’ll Need to Succeed
Ideally qualified to CIPD Level 5 or equivalent working experience.
Proven HR management experience with strong complex ER case management skills.
Ability to work confidently in a fast-paced environment and navigate ambiguity.
Strong relationship-builder with a proactive, people-first mindset.
Hands-on approach with the ability to roll up your sleeves and deliver.
A collaborative team player who enjoys working across a growing HR function.
Office Based 5 days per week - no remote working available.
Monday to Friday, working 40 hours per week.
Highly competitive salary
Non contractual bonus scheme
25 days annual leave (plus 8 bank holidays)
In-house training.
Company pension.
Fun and inclusive working environment.
Gift voucher incentives and opportunities to win quarterly recognition awards.
Wellness initiatives, including Bike2Work and healthcare scheme.
Free Life Assurance cover (x2 salary).
Uniform and PPE provided if required.
Excellent opportunities and career prospects are available.
Key Responsibilities
Performance & Culture
Lead performance management processes and act as subject matter expert for managers and employees.
Manage the implementation and ongoing optimisation of the company’s new performance management system.
Partner with managers to embed a culture of continuous feedback and high performance.
HR Operations & Compliance
Oversee day-to-day HR operations and lead HR projects to improve efficiency and service quality.
Ensure HR practices and company procedures comply fully with UK employment legislation.
Design and deliver engaging employment law training for managers.
Conduct regular reviews of HR policies to ensure alignment with best practice and legal updates.
Lead HR audits and address compliance notifications with timely and effective action.
Ownership of the Right to Work and Visa Sponsorship/Applications process.
Support 4 company payrolls
Employee Relations & People Support
Manage disciplinary, capability, and grievance cases, ensuring fair, consistent, and compliant outcomes.
Act as mediator to support managers and employees in resolving conflict and fostering positive working relationships.
Provide expert HR advice across the business, supporting decision-making and best practice.
Data, Systems & Insights
Monitor key HR metrics (attendance, absence, performance trends) and recommend proactive solutions.
Develop HR reports, dashboards and data insights to support senior leadership.
Serve as HRIS Lead, ensuring data accuracy and continuous improvement of digital HR services.
Initial screening
Microsoft Teams interview with our Talent Acquisition Partner
Face to face interview either in-person or Microsoft Teams
Decision outcome
We’ll close this role on 26th July, but may do so earlier if we receive strong interest so don’t miss out.
A final note...
Not sure you tick every box? Please don’t let that stop you from applying.
Need any reasonable adjustments? Just give our talent acquisition team a shout.
Any questions on your mind? Please reach out to us at
Neutral 2–4 sentence summary of what working at this company is like, drawn from public reviews and press coverage. Tone, collaboration style, pace, benefits highlights.
£45,000 – £60,000 (Glassdoor, Levels.fyi, 2025)
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