special effects supervisor
floor effects supervisor (as Allan Bryce)
coordinator: 'Alien' effects
additional 'Alien' mechanics (as Carlo DeMarchis)
maker: small 'Alien' forms
special effects technician
prop maker
creator: 'Alien' head effects
special effects technician (as David Watkins)
additional 'Alien' mechanics (as Dr. David Watling)
special effects (uncredited)
special effects technician (uncredited)
modeller (uncredited)
model maker (uncredited)