Keith Anderson, technical editor for the textbook series, has over 40 years of experience in aviation as an A&P mechanic, authorized inspector (IA), commercial pilot, flight instructor, and aeronautical engineer. He has worked in Part 91, 121, and 135 operations, has held multiple DOM (director of maintenance) positions, and has taught at the university level. His pilot/mechanic experience includes 10 years of living and working in Central and South America and Africa. Keith has worked as a design engineer in aircraft design and certification and has held multiple leadership roles including engineering director and vice president positions that have included STC certifications and the type certification (TC) of a single-engine turboprop airplane.