The Leadership Circle Certifications

Facilitator Bios


Roma Gaster

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Roma is a Director and Global Partner of The Leadership Circle. She's an international business consultant, facilitator, conference speaker and published author. Her qualifications include a Bachelor of Arts degree majoring in Economics and Japanese from the University of Sydney. Roma has a numerous professional accreditations relating to different organisational and leadership development diagnostic tools.

Born and raised in Kenya, she’s developed a love and respect for the traditions and behaviours of various cultures.  Early in her career, Roma worked as an economist as well as in sales in various industries including media and corporate education. In 1994, she founded an international consulting firm with a focus on individual, team, leadership and culture transformation.  Over the past 30 years she has worked around the world with executive boards, senior leaders, professional service partners, and managers of both large and small enterprises in a variety of industries including finance, banking, insurance, information technology, hospitality, health care and retail to name a few.

She is also the published co-author of The Equality Myth, a practical business book aimed at transforming business paradigms from hierarchical structures to collaborative systems (published by Allen & Unwin, 1995).

Her expertise and passion lies in organisational culture transformation, change management, merging cultures with acquired businesses, strategic direction and planning, executive coaching and management development. Her facilitation style is dynamic and interactive, demonstrating a deep commitment to assisting others to fully embody concepts and content in order to make a lasting difference in their chosen field.


Padraig O'Sullivan

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Padraig’s reputation as a leading international business coach has been established with over fourteen years leadership and coaching experience encompassing Australia, Asia, Europe and the Middle East. He has been labelled “one of Asia’s top leadership experts”. Harnessing solid, global business acumen and entrepreneurial thinking Padraig exhibits and delivers the critical understanding, character, expertise and hands on strategies to ensure clients achieve their transition and transformation goals.

A coach must immediately instil an assurance of expertise, professionalism, trust, passion and empathy. Padraig’s ability to create this environment, instantly making people feel at ease so they can just get on with the business of development, is what continues to make Padraig a leader in his field.

His notable client base and success stories confirm his dedication to achieving results. According to clients, making and executing of the ‘plans of action’ developed in their work together are the pathways to success. This is supported by Padraig’s pragmatic but entirely human approach. His colleagues state that another key element of Padraig’s success is his Irish sense of humour.

As an expert in expatriate transition he is the published author of the “Foreigner In Charge: Success strategies for expat leaders”, series of books featuring Australia, Singapore, Hong Kong and Dubai.  All books will be released into stores in 2016. Along with expatriates he works with CEOs, Managing Directors, Regional Heads and High Performing Leadership Teams. Typical assignments include supporting new CEO’s or other C level leaders, expatriate leaders in their transition, other leaders transitioning from functional management to company leadership; leadership effectiveness; developing high performing teams and clients in stretch roles.

Testament to his thought leadership, Padraig is also the co-author of “Leadership: Helping Others to Succeed” and contributor to an upcoming book by Peter Hawkins on team coaching. He is a sought after industry Keynote speaker and conference presenter.


Sarah Cornally

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With over 25 years as a leadership advisor Sarah specialises in developing leaders to create the cultures that enable organisations to thrive.  She holds a Bachelor of Applied Science (Occupational Therapy) from Cumberland College of Health Sciences; a Masters in Safety Science  (including organizational behaviour, industrial relations, engineering & law) from the University of New South Wales ; and received a Diploma & Advanced Diploma from the Australian Institute of Company Directors.  Sarah has a number of professional and post graduate accreditations relating to various organisational and leadership development diagnostic tools.

Sarah was sought out by C-suite executives to provide consulting services in the area of leadership, cultural change, empowerment and issue resolution as a result of her reputation in resolving complex and challenging issues in her early career as an Occupational Therapist. Since then she has consulted to and advised leaders from a wide range of organisations including AMP, APRA, AstraZeneca, CBA, the Dept of the Prime Minister & Cabinet, Coca Cola Amatil, George Weston Foods, IAG, KPMG, NSW Department of Human Services, Leightons Group, Macquarie Bank, Microsoft, NAB, PWC, QBE, Schering-Plough, Suncorp, and Woolworths.

Her leadership experience includes National President of the National Speakers Association of Australia and various NFP boards. During 2003 – 2015 she was a member of the Directors Coaching Panel and Faculty for the Australian Institute of Company Directors, Mastery in the Boardroom and Board Ready programs. Recently Sarah presented to the American Chamber of Commerce on ‘Exploring Women's Relationship with Power’ as part of her commitment to changing the conversation to one of complementary partnership.


Peter Shields

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Peter’s grounded confidence in Leadership and Strategic change Consulting comes from 18 years of practice in the Leadership Coaching and Facilitation space. He is an ICF Professional Certified Coach with over 5000 logged hours of Executive Coaching. Peter is also a faculty member for the Institute of Executive Coaching and Leadership and has assisted hundreds of professionals to transition their career to Executive Coaching.

As a Transformational Executive Coach Peter assists leaders beyond the transactional aspects of their role. He follows a ‘Deliberately Developmental approach’ (re- Kegan and Lahey) and assists his clients to lead for longer-term, whole system outcomes. He is sought by leaders ready to move towards service leadership and continues to work with senior leaders from the Financial, Engineering, Mining, Technology, Environmental and Legal Industries. Peter is also in high demand from Senior Government leaders.

Peter brings a unique blend of experience from once being both a Practicing Counselling Therapist and before that, the National Marketing Manager for a large Chemical Services business. This blended focus results in leaders achieving improved results by leveraging the human factors and collective capability of the teams they lead.


Judy Walker

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Judy Walker brings 25 years experience as a transformational facilitator and executive coach in the area of leadership and organisational culture. She is experienced in working with different cultures, having worked in many countries, including Australia, China, Europe, Malaysia, Middle East, New Zealand, South Africa and Taiwan.   

Judy inspires people to tap into their potential and express it in a way that profoundly changes the individual and their contribution to their team and the organisation in a sustainable way resulting in high performing teams and strong ROI. 

Judy understands that to create sustainable change it is important to look below the surface level of behavior and work with underlying beliefs and assumptions that drive behavior. She has a strong belief that everyone can make a difference and creates a challenging and safe environment for people to discover and demonstrate this difference.  She does this by authentically sharing who she is in a professional, warm and congruent way.