"Mr. Tomkinson is also termed as a “Chief Evangelist”, a fairly...

"Mr. Tomkinson is also termed as a “Chief Evangelist”, a fairly new term used in Silicon Valley, California to describe a person who builds up support for a given technology, and then establishes it as a standard in the given industry.
The first person to coin the term ‘evangelist’ within a commercial company was Guy Kawasaki, Apple’s enigmatic thought and product leader who helped Apple design its entire Macintosh product line in the 1980s."
http://finfeed.com/technology/zyb/cyber-security-specialist-zyber-lists-on-the-asx/20160217/