We are a specialist team of consultants offering expertise in employment and HR-related areas ranging across transformation and effectiveness, training, trade union negotiations, redundancies and dispute resolution. We work alongside gunnercooke lawyers and their clients to deliver strategic people solutions with commercial precision. With 90+ years of experience working across the UK, Europe, US and Asia-Pacific, we help organisations navigate complex change, workforce transformation, and critical people changes. Our approach is grounded and practical, focusing on outcomes, relationships, and common-sense, delivering clients with workable and sustainable solutions.

Our work includes:

• Organisational strategy, design and operating model transformation
• Workforce change, including complex redundancies and TUPE processes
• Merger and acquisition integration
• Cultural transformation and behavioural change programmes
• Operational and business performance improvement
• Mediation and employment dispute resolution
• Transition leadership development and executive coaching
• Technology change enablement and behavioural adoption
• Equity-based reward design and performance management systems
• Governance, HR advisory, and organisational effectiveness
• Talent and performance management infrastructures
• Change resilience infrastructures and practices
• Board-level advice on employment law, compliance and strategic people matters

Who have we worked with?

We bring deep cross-sector expertise, having worked with organisations across:

• Central and local Government (e.g. Inland Revenue)
• Health and education sectors
• Financial services and asset management
• Technology, data, and robotics
• Retail and logistics
• Nuclear and energy sectors
• Charities and non-profit organisations
• Real estate and private equity firms

Previous experience:

• Leading organisational design and global transformation programmes across multiple industries.
• Holding senior HRD roles on executive boards including IPO and NASDAQ.
• Delivering cultural remediation and behavioural alignment following regulatory scrutiny.
• Developing transition leadership capabilities to guide leaders through periods of intense change.
• Advising boards and executive teams on employment law, workforce strategy, and organisational effectiveness.
• Building performance, reward, and talent management systems aligned to commercial strategy.
• Navigating complex trade union negotiations and industrial relations during large-scale restructuring.

Den Power

Den Power

Strategic HR Consultant | Organisational Design Expert | Accredited Mediator

Operating Partner, gunnercooke LLP

Den is an accomplished HR transformation consultant and accredited mediator, working in partnership with law firms and their clients to deliver strategic people solutions with commercial precision. With over 20 years of experience across the UK, Europe, the US, and Asia-Pacific, Den supports complex organisational change, workforce transformation, and dispute resolution.

She brings deep cross-sector expertise spanning retail, nuclear, financial services, technology, logistics, and government. Her career includes senior roles on executive boards and high stakes assignments involving IPOs (including NASDAQ listings), M&A, cultural remediation, largescale restructuring, and navigating trade union dynamics.

Clients value Den’s practical, no-nonsense approach,focused on outcomes, relationships, and common-sense implementation. She specialises in:

• Organisational design and transformation
• Mediation and employment dispute resolution
• Complex redundancy and TUPE processes
• Equity-based reward structures
• Board advisory

Den is a CEDR-accredited mediator and holds a BA from Manchester University

Catherine Hayes

Catherine’s is an expert in organisational design, change, sustainability, resilience and cultural transformation. With over 30 years in the financial sector and 17 years of experience spanning broader industries such as health, professional services, technology, retail and real estate. Catherine has cemented her reputation as a specialist in designing and facilitating end-to-end business and global transformation programmes.

Her career has been dedicated to partnering with CEOs, boards and executive teams to diagnose organisational challenges, navigate complex transformations and deliver tangible, sustainable outcomes. Catherine’s work extends beyond strategy; she advises Boards, Exec teams, business leaders, legal, compliance, risk, change, sales and HR professionals.  Providing practical support to build robust infrastructures and resilient transition leadership capabilities to thrive in a world of continuous change.

At the heart of Catherine’s work is the Organisational Sustainability and Change Resilience Practice (OSCR).  An approach she established after 20 years of applied practitioner research, combining organisational, clinical and Buddhist psychologies.

Catherine’s OSCR Practice has become a cornerstone for organisations seeking to enhance effectiveness, consistently achieve successful outcomes and sustainable growth. Her approach is grounded in practical, evidence-based diagnostics and tools that support leaders and teams in building sustainable infrastructures.  Plus, support in acquiring critical Transition Leadership practices and capabilities whilst practically delivering their transformation agendas.

Her passion is not just about solving immediate challenges, it’s about focusing on creating lasting practices for sustainability, resilience and continuous enhanced performance.

Catherine Advises & Provides Support With

• Diagnosing & enhancing organisational performance
• Designing & implementing operating model transformations
• Building organisational sustainability & resilience infrastructures
• Mitigating operational risks through translating strategy into practice
• Translating strategic values into operational behaviours
• Developing resilient organisational change infrastructures
• Facilitating Transition Leadership capability development & adoption
• Fostering leadership & workforce behavioural change
• Facilitating technology implementation, adoption & migration
• Building resilient talent & performance management systems
• Coaching & mentoring transitional journeys for executives and leaders