Ash Wednesday marks the start of a 40-day period which is an allusion to the separation of Jesus in the desert to fast and pray. During this time he was tempted. Matthew 4:1â11, Mark 1:12â13, and Luke 4:1â13.
Leadership | Management. Biography. Barry Posner, Ph.D., is the Accolti Professor of Leadership at the Leavey School of Business, Santa Clara University (located in the heart of Silicon Valley), where he served for 12 years as Dean of the School.
Founders and Authors. 1  Jim Kouzes and Barry Posner have been working together for more than thirty years, studying leaders, researching leadership, conducting leadership development seminars, and serving as leaders themselves in various capacities. They are coauthors of the award-winning, best-selling book The Leadership Challenge.