WordNet (r) 3.0 (2006):

steelman
    n 1: a worker engaged in making steel [syn: steelmaker,
         steelworker, steelman]

The Free On-line Dictionary of Computing (30 December 2018):

Steelman

   DoD, June 1978.  Fifth and last of the series of DoD
   requirements that led to Ada.  "Steelman Requirements for High
   Order Programming Languages", US Dept of Defense, June 1978.
   SIGPLAN Notices 13(12) (Dec 1978).  (See Strawman, Woodenman,
   Tinman, Ironman).