Marc Shiels
Senior Culture Change Lead @NatWest Group
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WORK HISTORY
Senior Culture Change Lead @NatWest Group
Edinburgh, GB
Driving enterprise-wide transformation through innovation, experimentation, and cultural change at scale. • Led the design and rollout of a Bank-wide experimentation strategy to drive simplification, growth, and innovation. • Created a movement that engaged 60K+ colleagues—starting with the top 200 leaders—embedding a culture of test-and-learn and continuous improvement. • Set up a central hub for experimentation, enabling 1,400+ logged experiments in 18 months and a 9-point uplift in colleague sentiment. • Earned global recognition as a published IMD case study. • Embedded experimentation into critical areas like performance management, onboarding, and fraud prevention—impacting 16K+ colleagues. • Reimagined a 30-year-old performance system through iterative, colleague-first design. • Currently leading cross-functional delivery of ‘Winning Together’—NatWest’s refreshed purpose, strategy, and performance culture. • Achieved 73% colleague clarity on strategic aims via targeted communications and behavioural activation. • Built a network of 300+ Culture Champions to drive behaviour change through peer-led storytelling. • Integrated new behaviours into hiring and onboarding processes, supported by a measurement dashboard aligned to OKRs. • Partnered across tech, comms, and people teams to support 60K+ colleagues in adopting Microsoft 365 and AI tools like Copilot.
EDUCATION
Abertay University
BSc Behavioural Science (Hons), Behavioral Sciences
SKILLS
ABOUT MARC SHIELS
I help organisations build inclusive, high-performing cultures through strategic change, experimentation and insight-led transformation.At NatWest Group, I led the creation of an enterprise-wide culture of experimentation — 1,400+ experiments, colleagues engaged, and measurable shifts in inclusion, innovation and performance. This work taught me how to turn curiosity and data into real organisational impact.I’m now exploring new opportunities where I can bring this approach to life again — helping organisations turn purpose into performance at the intersection of culture, innovation and strategy.If that resonates with your organisation, let’s connect.
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