HR Outsourcing Services London | HR Consultancy & Support | Sigma
London HR Consultancy

HR Strategy for
London Business.

We serve as your dedicated, strategic HR partner. From employment law compliance to talent optimization, we help London's most ambitious companies scale safely.

+500

500+

London Directors Supported

London HR Outsourcing Meeting
Our Expertise

Comprehensive People Solutions.

Scalable HR support designed for the lifecycle of your business.

Outsourced HR Director

Strategic HR advice without the full-time headcount. We handle organizational design, culture, and growth planning for you.

Employment Law

Stay compliant with UK legislation. We manage contracts, handbooks, and complex disputes to minimize risk.

  • Tribunal Representation
  • Settlement Agreements
  • TUPE Transfers
  • Redundancy Planning

Employee Relations

Expert handling of disciplinaries, grievances, and absence management.

Wellbeing & Benefits

Designing competitive retention packages and wellness initiatives.

Sectors

Tailored for London's Economy.

We understand the specific people challenges across key industries.

Finance & Legal

Managing high-performance cultures, partnership agreements, and regulatory compliance (SMCR) for City firms.

Tech & Startups

Scaling culture rapidly, managing remote teams, and structuring share options for Old Street & Shoreditch ventures.

Hospitality

Handling high turnover, seasonal contracts, and tip/tronc policy compliance for West End venues.

Healthcare

CQC compliance checks, mandatory training tracking, and shift management policies.

Manufacturing

Health & safety discipline, union relations, and shift pattern negotiations.

Retail

Multi-site communication, seasonal onboarding, and performance management.

Construction

Subcontractor (CIS) agreements, site safety compliance, and project-based contracts.

Logistics

Driver compliance management, working time directive checks, and agency staff handling.

Recruitment Agencies

Internal staff retention strategies, commission structure policies, and high-growth onboarding.

"Sigma's HR team navigated a complex TUPE transfer for us during our recent acquisition. Their commercial awareness and attention to detail were invaluable."
JS
James Sterling CEO, London Fintech
"Having Sigma as our outsourced HR Director gave us the confidence to scale our team from 10 to 50 employees in under a year. Highly recommended."
AL
Sarah Jenkins Operations Director, Creative Agency
Why Choose Sigma?

HR, Simplified.

We aren't a call center reading from a script. We are a team of London-based HR professionals providing commercial, pragmatic advice to protect your business.

London HQ

Real experts you can meet.

CIPD Qualified

Certified professionals.

24/7 Advice Line

Support whenever needed.

Liability Insurance

Tribunal indemnity cover.

Speak to an HR Expert

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Expert Insights for Growing UK Businesses

Stay ahead with recruitment strategies, HR compliance updates, and industry trends from our team of UK employment specialists.