David Callen
INSTRUCTOR
David Callen holds a Master of Divinity and a Master of History from Trinity International University in Chicago, Illinois. He is the founder of People & Process Improvement, LLC, and holds Lean and Six Sigma Black Belt Certifications from the University of Idaho and Boise State University. David is also trained in the SIMA® methodology (System for Identifying Motivated Abilities), which he applies to strengthening team facilitation, strategic planning, workflow design, and performance improvement.
Through his company, People & Process Improvement, David combines Lean and Six Sigma principles with SIMA® insights to elevate collaboration, efficiency, and measurable outcomes.
Also, serving more than 15 years as a pastor-teacher, David built small groups and ministry teams that cared for one another and connected with their communities. He also spent four years teaching at the high school level, presenting 17 courses in subjects such as Bible, history, career development, speed reading, and media analysis—often crafting the curriculum himself.