9. IT Managers

Larry Page

 Larry Page is an example of a "Communicator" and a "Leader" manager in my opinion. As a CEO of Google he always had a clear view of the company's goal and changed management team structure several times to improve the work environment and better guide them to their goal. The first big change was made in 2001 when Page decided to fire all of the project managers because he didn't like that non-engineers were supervising engineers work. This, however, didn't stay like that for too long: soon problems with management began to arise and Google had to hire project managers again.
 After becoming the CEO of Google again in April 2011, Page had plans to take the collaboration and unity among the teams to a higher level. He created a team of senior vice-presidents who worked close to his office, so they could easily report directly to him.

Jeff Bezos

 The CEO and President of Amazon Jeff Bezos can most likely be described as a "Change agent" type of manager. Constantly moving forward and innovating, Jeff's "Day 1" Management Philosophy greatly contributed to the growth of Amazon. According to Jeff, if a company wants to thrive then it needs to stay on Day 1 - "start up". Slipping to Day 2 - "stasis" would be followed by "irrelevance", "excruciating, painful decline" and lastly "death" or bankruptcy of the company. His principles are to focus on the customers and not the competitors, strive for market leadership, adopt external trends and making high quality decisions quickly.

Sources:
1. "The Untold Story Of Larry Page's Incredible Comeback" By Nicholas Carlson (2014)
2. "There's A Pretty Big Tension In How Larry Page Is Running Google" By Owen Thomas (2013)
3. "Google's Page to Replace Schmidt as CEO" By Amir Efrati And Jessica E. Vascellaro
4. "This is the Jeff Bezos playbook for preventing Amazon’s demise" By Jason Del Rey