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Grainne Sibley

Executive Programs

Executive Coach, PCC, MS

Get to Know Grainne

Gráinne has over 20 years’ multidisciplinary experience serving and leading senior professionals in high-profile leadership environments. She drives individual and group creativity, strategy, and problem solving by harnessing productive discomfort. She has advised and guided a wide range of exceptional clients in high stakes, decentralized, and complex environments. Gráinne earns the trust of her clients by having firsthand senior leadership experience that informs each of her coaching inquiries and processes.


Gráinne maintained a stellar leadership reputation and progressive track record of promotions and recognition throughout her career in positions with global implications. She has simultaneously served as a Leader, an expert Strategic Organizational Facilitator, and a respected Executive Leadership Coach. She partners with clients to deliver custom group, leadership, and professional development programs and services focusing on trust, collaboration, developing new insights, and driving tangible outcomes. Her diverse toolkit is enhanced by her ability to understand when and how to employ the right techniques. Since 2004, she has led GEOINT, data, and financial analyst, standards and systems engineers, staff officers, strategic planners, influence and perception management officers, and supervisors at various U.S. agencies and in the war zone.


A Lego Serious Play (LSP) and Creative Education Foundation-certified Creative Problem Solving (CPS) practitioner, Gráinne enjoys helping leaders clarify their visions, beliefs, and values to expand their capacities to lead and influence. She enjoys coaching on executive presence, conflict resolution, the parts of leadership that are “messy and complex,” overall wellbeing, boundaries, and balance. Gráinne has been certified by the International Coaching Federation since 2007 and maintains advanced certifications in several 360 and personality assessment tools. In addition, she is a Mentor Coach for IDEO University, has a Certificate in Design Thinking from IDEO University, and is a Certified Practitioner of Human-Centered Design by the LUMA Institute.


Gráinne received a B.A. in Political Science and German from the College of William and Mary, an M.S. in Conflict Analysis and Resolution from George Mason University, and a Master’s Certificate in Executive Leadership Coaching from Georgetown University.

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