Team
Pierre Montersino
Managing Director
pierre@piermontdc.com
Dianne van Deventer
Operations Director
dianne@piermontdc.com
Simon Clayton-Mitchell
Head of Cyber Security
simon@piermontdc.com
Ray Jones
Christos Panayiotou
Head of Training
Pierre Montersino – Managing Director
Pierre is the Managing Director of PierMont Digital Consultancy and is solely focussed on supporting clients to achieve their strategic change agendas by enabling them to scale their transformation and change capability.
Pierre delivers outcome based, end-to-end solutions for organisations using a combination of our bench of top-tier consultants, industry subject matter experts and programme and project teams.
Pierre specialises in getting the most out of existing client teams: refocusing, repurposing and giving voice to solutions so often ‘hidden in plain view’, re-structuring the governance and organisation to focus on the task in a more effective and efficient way, and setting up the drum beat for effective delivery.
In his spare time, he balances the challenges of raising two sons with a keen interest in rugby, training dogs, chess and backgammon.
Dianne van Deventer – Operations Director
Dianne developed her interest in operational development and human resource management whilst working with London Underground.
During her time there, her post required an in depth understanding of complex change management programmes for example the development of the Oyster Card, the progress of the Extended Jubilee Line and numerous internal change programmes which introduced a new culture across the company.
Dianne was also part of a team working on projects to determine alternative funding arrangements for the organisation. One of these led to the company’s devolution into a central operating organisation, supported by independent infrastructure contractors, now Transport for London.
Simon Clayton-Mitchell – Head of Cyber Security
Ray Jones – Head of Change Management
With over 25 years of experience driving successful transformation across global brands, he consistently delivers impactful results by putting people at the heart of change.
From leading culture programmes to executing large-scale digital and IT transformations, his approach focuses on aligning vision with execution. Whether supporting 2,500 civil servants in UK Central Government or engaging 6,000 Vodafone retail teams across 21 markets, he ensures lasting impact through strategic stakeholder engagement and structured delivery.
Ray is a recognised subject-matter expert in change management, he specialises in navigating complex transformations with clarity and precision.
His expertise spans technology implementation, culture change, executive coaching, and Target Operating Model (TOM) design. With a strong academic foundation—including a postgraduate diploma in Change Agent Strategies—he combines theoretical rigour with practical delivery, consistently supporting organisations to transition with confidence and resilience.
His strengths lie in leading with empathy, influencing at all levels, and building cross-functional alignment.
He is a certified executive coach, Scrum Master, and skilled at unlocking the potential of teams and individuals. Whether mobilising 14 simultaneous projects at Jaguar Land Rover or shaping business readiness strategies across European markets, he brings a calm authority, adaptive leadership, and deep insight to every engagement
Christos Panayiotou – Head of Training
Christos is an experienced AI trainer, specialising in helping SMEs understand artificial intelligence and get the best from general-purpose tools such as ChatGPT to become more effective in their day to roles.
With over 20 years of experience in sales, marketing, and customer experience, Christos focuses on helping businesses identify real world use cases for AI to improve efficiency and drive growth.
Christos has trained companies such as Allianz Trade, Royal college of Physicians, Duke of Edinburgh and the MOD in best practice techniques that save time and generate brilliant human centred results.