Mariana Yarnold is Founder and Managing Director of MBY Consultants Ltd, specialising in commercial leadership, organisational transformation and strategic change management. Her career spans nuclear, defence, energy, infrastructure and manufacturing sectors, where she has held senior commercial roles managing complex delivery, reputation and financial performance.
Mariana works with leaders to strengthen commercial control, protect value and make better decisions in complex and regulated environments. Her expertise encompasses risk management, governance, contracts, change leadership and delivery. She brings technical depth without unnecessary abstraction, challenging assumptions and building capability within existing teams.
Her particular focus is on the commercial architecture behind organisational performance: how strategy, governance, risk allocation, decision-making and delivery work together, and what happens when they do not. Her approach is practical and direct, bringing clarity to complex environments where sound commercial judgement is essential.
Through MBY Consultants, Mariana partners with organisations operating in commercially demanding and regulated sectors to restore commercial control, adapt under pressure and grow with confidence through sustainable delivery.
