Board Thread:Questions and Answers/@comment-68.2.144.3-20130418101731/@comment-1504072-20130418122824

Apparently they do refer to Dr. Clark once with a male pronoun in the original Japanese script, according to Para-Medic's own article here (under "Behind the scenes"). The gender for such a minor character in MGS1 was not important at that time. When Konami decided to make Clark and Para-Medic the same character, in order to conjure up more links between the different games, this small discrepancy was the result.