Mili Kacher works with C-suite teams to bridge the gap between strategy and execution during moments of rapid organisational change. A qualified PMP and PhD holder, she combines rigorous methodology with practical leadership to drive transformational outcomes. With more than 10 years leading cost optimisation, turnaround, and M&A programs within private equity—along with earlier work driving strategy implementation for Fortune 500 companies—she has built a track record of making complex transformations achievable. Her career has spanned major global markets across Europe, US, the Middle East and Asia-Pacific, supporting leaders through some of their most critical shifts. She is the co-founder and a Partner at SparkUpBlue, a boutique consultancy from London specialising in complex change.

Nathalie Lion is a transformation and people-operations leader who specialises in helping organisations build the leadership alignment and behavioural foundations needed for lasting change. A Sorbonne graduate with CIPD and Neuroleadership coaching qualifications, she brings more than twenty years of experience living and working across five continents and ten countries, leading people functions for large international businesses (10000 employees +). Her career spans complex organisational changes across both private and Fortune 500 companies —from post-M&A culture and capacity assessments to large-scale culture redesigns, leadership alignment, internal capability deployment and organisational restructuring. She is known for translating ambitious transformation goals into the day-to-day leadership behaviours, team dynamics, and people systems that make change stick. She is the co-founder and a Partner at SparkUpBlue, a boutique consultancy from London specialising in complex change.