Valerie Gleeson

A Senior Practitioner accredited executive coach and facilitator,  Valerie brings a wealth of experience from senior leadership roles, both with large multinationals in global roles and with semi-state organisations.  This experience spans multiple disciplines including Strategic Finance, IT and Portfolio & Programme Management, over a period of 30 years.

The breadth of her experience reflects her passion for leading positive transformation within organizations and the development of new capabilities at Individual, team and organization level.

Recognised as a highly effective transformative coach and vertical development consultant, Valerie is very strategic in her approach to coaching, enabling leaders to develop their leadership capacity to better navigate their ever-changing environments.

Maria O’Dwyer

Maria is an accredited executive coach who specialises in guiding professionals through change in their professional life. With over 12 years’ experience in Recruitment and HR, Maria’s coaching style is rooted in real-world experience, guided by insights and deeply attuned to people’s needs.

As a coach, Maria’s signature strength is her ability to connect with her clients, offering both support and challenge, motivating her clients to take meaningful action toward their goals.

With Harmonics, Maria offers 1:1 Career Transition Programmes, 1:1 Career Stocktake Programmes and 1:1 Executive Coaching Programmes as well as facilitating Group Outplacement Workshops and Career Development programmes.

Valerie Brereton

Valerie is an accredited executive coach who specializes in enhancing professional performance during periods of growth and transition.

Her successful career in sales sparked a passion for performance psychology. Through her work in management and training—and her own lived experience—she understands the challenges professionals face when striving for excellence amid personal and professional hurdles, as well as the transformative impact that evidence-based coaching can deliver.

To ensure clients receive high quality support, Valerie earned MSc degrees in Personal and Management Coaching from University College Cork and in Pluralistic Psychotherapy from the Irish Institute of Counselling and Psychotherapy.

Today, she blends business acumen with solution-focused strategies and a broad range of psychological approaches—including acceptance and commitment coaching and mindful awareness—helping clients build confidence, strengthen decision-making skills, maximize leadership potential, and embed mental fitness strategies that enable them to thrive in demanding situations.