CEO Advisory

Clemmie Vaughan is an accomplished leadership advisor and former Group CEO with deep-rooted expertise in executive coaching, organisational leadership and strategic development.

Clemmie’s career spans more than 15 years in investment management. As Group CEO of Ruffer LLP from 2017 to 2021, she oversaw a period of significant transformation – growing assets under management, expanding the firm’s international presence, digitising operations and leading a team of 350 people. Prior to and alongside her leadership role, she maintained an active portfolio management remit, investing globally across different mandates and asset classes.

At Goldcrest Partners, Clemmie in one of our investor coaches and part of the team that delivers our flagship Developing Investment Excellence programme. She also provides advisory and senior executive coaching to CEOs and C-Suite members.

Clients value Clemmie’s warm yet incisive style. She is known for asking the difficult questions with empathy, helping leaders pause, reflect and refocus. Her own experience as a CEO gives her a uniquely grounded perspective that blends commercial knowledge with the personal development to fulfil professional potential.

Clemmie is an accredited executive coach through Meyler Campbell and holds non-executive roles, including Chair of CG Asset Management, Non-Executive Director at Wren Sterling and Chair of Governors at St Mary’s School, Ascot.

Cressida Hamilton is a seasoned executive coach and leadership consultant who brings a powerful combination of corporate experience and communication expertise to her work with senior leaders.

Cressida’s background spans more than two decades in financial services, where she held several senior leadership roles within Operations and the Chief Operating Office. Most notably, she served as Group Chief Administration Officer for HSBC Bank PLC, overseeing complex, global teams of more than 3,000 employees within Banking and Markets Operations and Client Onboarding.

At Goldcrest Partners, Cressida provides executive coaching to Executive Committee members and those aspiring to these roles, supporting them as they step into new responsibilities, navigate transitions and develop the communication skills needed to operate at board level. Her work consistently focuses on helping leaders build confidence – whether with teams, clients or stakeholders.

Cressida’s style is warm, intuitive and results oriented. Her focus lies in helping leaders refine their communication, build executive presence and operate with greater clarity and impact in pressurised environments.

Cressida trained as an executive coach with the Institute of Human Development and is an accredited Personal Performance Coach with The Coaching Academy. She holds an MBA from Henley Business School, is DISC assessment accredited and is fluent in a variety of evidence-based coaching models.

Eilish Jamieson is an experienced executive coach and board advisor who brings deep industry knowledge, strategic insight and a strong track record of leadership development to her work with senior leaders.

Prior to qualifying as an executive coach, Eilish spent most of her career at Goldman Sachs as an Executive Director and Head of Audit and was responsible for leading strategic initiatives around change and transformation, culture, governance and diversity. She helped design the firm’s diversity programmes for early female talent and delivered the global audit leadership development programmes. Her career began with KPMG where she qualified as a Chartered Accountant, working within their financial services practice across the UK and Australia.

At Goldcrest Partners, Eilish provides advisory and senior executive coaching to C-Suite members and those who aspire to these roles.

Eilish’s style is warm, thoughtful and highly intuitive. She builds strong, trusting relationships with her clients, offering both challenge and support. She is especially passionate about supporting women in leadership and is a committed advocate for greater diversity and inclusion across organisations.

As well as being a qualified executive coach and Chartered Accountant, Eilish is a Non-Executive Director at the British Business Bank, an Ambassador for Women on Boards UK and a guest lecturer on diversity and inclusion at leading UK business schools.

Martin Oakley is a qualified coach and seasoned leadership advisor who draws on a thirty-year global career in financial services to support senior leaders unlock their full potential.

Martin spent the majority of his career working outside of the UK or in global leadership roles, so he has a unique insight into the challenges of cross-cultural leadership in complex, multinational organisations. His leadership journey includes building a successful Asian Prime Brokerage business from the ground up and serving as Chief Operating Officer for a global investment bank, where he led complicated organisational change and transformation.

At Goldcrest, Martin provides advisory services to CEOs, senior executive coaching to C-Suite members and is part of the team developing leaders who aspire to these roles. His focus is on helping leaders develop, deliver compelling strategies and build high-performing teams.

Martin is known for his calm presence, strategic mind and ability to listen with insight and intention. Whether coaching one-to-one or facilitating a senior team, he combines thoughtful challenge with encouragement, all while having a rare depth of perspective to his work.

Martin holds an executive coaching qualification from Henley Business School and has recently completed his Master’s in Coaching for Behavioural Change – all part of his commitment to life-long learning.

Ian Mair is an accomplished executive coach and strategic advisor with a unique blend of commercial, financial and academic expertise.

Ian began his career in medical sciences, earning a doctorate before transitioning into the pharmaceutical industry. He later trained as a management accountant and built an extensive leadership career across the retail, property and pharmaceutical sectors. As Finance Director at Tesco, he led teams across Asia, including a major business transformation in China. He went on to hold senior roles including COO, Group Services Director and MD at one of the world’s largest private landowners, with a focus on driving innovation and operational change.

At Goldcrest Partners, Ian delivers one-to-one senior executive coaching to C-Suite members and provides CEO advisory. He also leads modules within our Senior Talent Development programmes – both in-house and open enrolment – to enable high potential talent on the succession path. He brings particular expertise in strategy, team effectiveness and innovation, informed by executive study at MIT on AI and the future of leadership.

Clients value Ian’s thoughtful, curious and outcome-driven approach. He combines calm authority with intellectual rigour and a focus on practical results, enabling senior leaders to stretch their thinking and deepen their impact.

Ian trained with Barefoot Coaching, is Hogan certified and a member of the ICF.

Charlotte Housden is a respected coaching psychologist and leadership development expert with specialist expertise in behavioural change and executive performance.

Charlotte brings over 30 years’ experience leading internal leadership development functions for financial services organisations and running client behavioural change programmes whilst at KPMG, PA Consulting and other independent consultancies. Charlotte has worked for, or supported, financial services organisations such as Barclays, RBS, Lloyds Bank, Santander, AIG, AXA, Lloyd’s of London, QBE and Royal London.

At Goldcrest Partners, Charlotte contributes to our Senior Talent Development activities, which include both in-house and open enrolment workshops and programmes. She also provides one-to-one executive coaching for senior leaders and executive committee members, helping them shift thinking, drive positive cultures within teams and focus on sustainable change.

Charlotte’s approach is rooted in her deep knowledge of psychology and behavioural change combined with her practical experience within the financial services sector.

Charlotte is a Chartered Coaching and Occupational Psychologist and an Associate Fellow of the British Psychological Society. She holds a BSc in Psychology, an MSc in Occupational Psychology and a Diploma in Coaching Psychology. She is also a published author on personal change and a Certified Principal Business Psychologist.

Richard Wilmot is the co-founder and managing partner of Goldcrest Partners, a leadership advisor, executive coach and expert in the fields of investor and C-Suite development.

Richard trained as an accountant at PwC before joining Newton Investment Management, where he led the UK equity team and managed flagship growth equity portfolios. During his investment career, he regularly engaged with CEOs and CFOs of public companies, honing his insight into leadership at the highest level. He has also held a broad range of senior leadership roles himself and developed a strong understanding of the part decision-making, strategy and resilience play in success.

At Goldcrest, Richard works across the business, with a particular focus on our Investor Development practice, helping clients improve thinking skills, teamwork, leadership, communication and resilience. He also contributes to our C-Suite Development practice, providing CEO advisory services, executive committee offsite facilitation and senior executive coaching to C-Suite members.

Clients appreciate Richard’s direct, yet empathetic approach, combining sharp commercial realism with a collaborative style that encourages reflection and growth. His background as a portfolio manager brings an incisive and strategic perspective to his work, enabling clients to adjust their views and find fresh ways forward.

Richard holds qualifications from London Business School, the CFA Institute and ICAEW. He is a Professional Certified Coach with the International Coach Federation and a registered psychometric test user with the British Psychological Society.

Tim McEwan is the co-founder and Managing Partner of Goldcrest Partners and a recognised expert in leadership, culture and teams.

Tim began his career in the British Army and later became a Leadership Instructor at the Royal Military Academy Sandhurst. After leaving the military, Tim held senior leadership roles including Global Head of Leadership and Learning at Henderson Global Investors.

At Goldcrest, Tim works across the business with a strong focus on C-Suite development. He facilitates executive committee offsites, provides CEO advisory services and one-to-one executive coaching to C-Suite members. In addition, Tim contributes to our open enrolment and in-house Senior Talent Development programmes for those on the succession pathway. His key areas of expertise include enhancing communication for leaders & teams and helping them to embed stronger company culture.

Clients value Tim’s warm and engaging style, his deep industry experience and his expertise in skills that are often underdeveloped, but crucial to success in the financial services sector.

In 2015, he was appointed a Fellow in Management Practice at the University of Cambridge Judge Business School, collaborating closely with their Executive Education department on leadership, high-performing teams and organisational culture. He co-authored The Balanced Leader, published in 2021 and is a seasoned keynote speaker and frequently moderates panels, bringing insight and clarity to complex leadership challenges.