Harold Hillman


Harold Hillman is the managing director of Sigmoid Curve Consulting Group. Based in Auckland since 2003 and a New Zealand citizen since 2008, Hillman coaches business leaders and executive teams to be more purposeful about leadership and what it means to inspire others towards greater possibilities.

Prior to launching Sigmoid, Hillman served in senior executive roles with Fonterra, Prudential Financial and Amoco Corporation. A clinical psychologist in his early career, he developed a passion for leadership development while teaching at the United States Air Force Academy. Hillman was a member of the task force commissioned by the Clinton administration in 1993 to end discrimination against gay citizens wanting to serve openly in the US military.

Hillman earned a master’s degree in education from Harvard University and a PhD in clinical psychology from the University of Pittsburgh. His first book, The Impostor Syndrome, was published in 2013. Hillman’s second book, Fitting In-Standing Out, was published in 2015 and brought major attention to his personal story of living an inauthentic life as a well-decorated military officer, who happened to be a closeted gay man.

A big fan of learning curves, Hillman has set himself a major goal to continue exploring over the next decade the frontier of authenticity, pushing forward into uncharted territory.

Where to buy in print


The Six Elements of Effective Listening: How Successful Leaders Transform Communication Through the Power of Listening
Price: Free! Words: 6,390. Language: English. Published: February 29, 2016 by Sigmoid Curve Consulting Group. Categories: Nonfiction » Business & Economics » Business communication / general
To communicate better, it may be time to do a re-frame on what it means to really listen to someone. This book introduces six ways to listen: (1) with compassion, (2) to reflect and clarify, (3) to surface assumptions, (4) playing the contrarian, (5) to offer balance, and (6) connecting all the dots. Strong leaders know which listening style is needed when. It pays to know the difference.