Hayes was a 24th century Federation Starfleet crewmember. In 2370 he served as part of the engineering staff aboard the USS Enterprise-D. The following year, Hayes was serving as a tactical officer on the bridge. (ST website: StarTrek.com)
Parallel reality[]
In one parallel timeline timeline experiences by Lieutenant Worf in 2370, Geordi La Forge had been injured and Hayes filled in for the chief engineer. (ST website: StarTrek.com)
External links[]
Hayes (Ensign) article at Memory Alpha, the wiki for canon Star Trek.