Board & Governance appointments

Tom is a Senior Partner at Millar Cameron, leading international executive search mandates across the food and agriculture, natural resources, climate, development finance and impact investing sectors. He works globally with multinational corporations, private equity firms, development finance institutions, family-owned businesses and industrial companies to appoint senior executives and board members.

He has over a decade of experience in executive search and leadership recruitment, advising clients on retained search assignments, board appointments, succession planning and confidential strategic hires. His work is focused at Executive Committee and Board level, with particular experience in CEO, Managing Director, CFO, COO and investment leadership appointments, as well as board and non-executive roles.

Tom has completed searches across more than 40 countries and has particularly deep networks in Europe, Asia and Africa, alongside significant experience across North and South America. His work spans both growth-oriented and established organisations operating in complex international markets. He holds a degree in History from the University of Reading.

Marta has over a decade of experience in executive search and recruitment, including leading the European Executive Search function of a multinational talent brand. She has worked with organisations across the EMEA region to address strategic resource planning needs and to identify, engage and appoint critical talent.

She is experienced in supporting organisations through change and is committed to building cultures of continuous improvement. Marta is also passionate about the role recruitment can play in advancing diversity, inclusion and equity, and in sharing best practice across the profession.

Outside work, she has a strong interest in social science, culture and design. Marta holds a BA in Cultural Studies from the University of Warsaw.

Grace has over 15 years of experience in talent acquisition across Africa and Asia, with expertise in executive search, leadership recruitment and workforce planning. At Millar Cameron, she supports mission-driven organisations in developing effective recruitment strategies and appointing talent across leadership and operational roles.

She has worked with international NGOs, social enterprises and corporate organisations, and is experienced in building recruitment frameworks, improving hiring processes and aligning talent strategy with organisational priorities. She has also led large-scale hiring initiatives, including a recruitment project that supported significant workforce growth for a fast-scaling social enterprise.

Grace is known for her data-driven and market-informed approach, as well as her commitment to diversity, inclusion and sustainable hiring practices. Outside work, she enjoys spending time with her family, supports climate action initiatives, and is an active CrossFit athlete.

Conor O'Callaghan is the Founder and Managing Partner of Millar Cameron, an executive search firm specialising in leadership recruitment across emerging markets. With more than 30 years' experience in executive recruitment, he has spent the past 19 years focused on identifying and placing senior leaders across Africa.

Conor has led C-suite and board-level appointments across a broad range of sectors, including private equity, agriculture, consumer goods, forestry, international development, and technology. He has built a reputation for partnering with organisations to identify transformational leaders capable of driving growth and long-term impact in complex and fast-evolving markets.

He holds a BA in Spanish and Latin American Studies from the University of Portsmouth and the University of Mariano Gálvez in Guatemala.

Alongside his professional career, Conor is actively involved in education and community development. He is a Trustee of the Merchant Taylors' Oxfordshire Academy Trust and serves on the Walter Bigg Foundation, which supports young people in his local community. He is also a committed advocate for offender rehabilitation and has dedicated more than 22 years to mentoring and supporting individuals within the prison system.

Tim Co-Leads Millar Cameron’s Power & Infrastructure Practice and has over 25 years of experience in executive search, with extensive expertise across the power, infrastructure and construction, technology and telecoms, and professional services sectors. He has worked with a wide range of clients in the UK and Europe and, over the past 15 years, across Africa, where he has led assignments throughout the continent.

He has completed a broad range of executive and non-executive searches, including appointments for African utilities, senior finance and commercial roles in listed software and telecoms businesses, investment professionals for private equity and development finance institutions, and project and programme directors for leading construction companies and infrastructure asset owners.

Before moving into executive search, Tim spent 10 years in the British Army as an officer in the Royal Engineers. Much of this time was focused on officer recruitment, assessment and leadership development, and he concluded his service as an instructor at the Royal Military Academy Sandhurst.

He holds an MA in Political Economics from the University of Aberdeen.

Justin is Co-Lead of Millar Cameron’s Power & Infrastructure Practice. He has more than 18 years of experience in executive search, leadership recruitment, and talent advisory, with a focus on renewable energy, power, infrastructure, mining, sustainability, and impact investing.

He works closely with investors, developers, operators, and advisory firms to build and strengthen the leadership teams driving Africa's energy transition, delivering senior executive and non-executive searches and assembling start-up teams for new ventures and platforms. He has also supported multinational businesses as they expand into Africa and the Middle East.

Before moving into executive search, Justin spent 15 years in sales and marketing roles within manufacturing and design businesses. He holds a BA in Geography from the University of Newcastle.