Be the Unicorn: 12 Data-Driven Habits that Separate the Best Leaders from the Rest. William Vanderbloemen has been leading the Vanderbloemen Search Group for 15 years, where they are regularly retained to identify the best talent for teams, manage succession planning, and consult on all issues regarding teams. This year, Vanderbloemen will complete their 3,000th executive search. Prior to founding Vanderbloemen Search Group, William studied executive search under a mentor with 25+ years of executive search at the highest level. His learning taught him the very best corporate practices, including the search strategies used by the internationally known firm Russell Reynolds. Prior to that, William served as a Senior Pastor at one of the largest Presbyterian Churches in the United States.