International Consultant; CEO, New Frontier 21 Consulting; Former Middle School Teacher and Principal; Former High School Principal; Recognized by the Global Gurus organization as one of the "30 Most Influential Educational Thought Leaders" in the world in 2021; Best-Selling Author of the books, Revisiting Professional Learning Communities at Work (2021, 2nd Edition), Time for Change: The Four Essential Skills of a Transformational School Leader (2019), Transforming School Culture: How to Overcome Staff Division (2017, 2nd Edition), Overcoming the Achievement Gap Trap: Liberating Mindsets to Effect Change (2015), and The Will to Lead and the Skill to Teach: Transforming Schools at Every Level (2011)