William Stryker Sr. was a high ranking CIA official.
The partner of John McCone and the boss of Moria MacTaggert, Stryker initially refused to believe in the Mutant race. Initially Stryker thought Charles Xavier a spy. In the end, Stryker ended up choosing against the mutants. It was ironic foreshadowing, as his son would be heavily involved in the creation of the Sentinels.