[@Cyrania] Stark Industries is really only 'Stark' in name only. Tony has no participation in the day to day and has distanced himself from it so as not to tarnish its new venture into clean energy with his presence and his father's legacy. The company is based out of the Los Angeles area, and operates primarily along the West Coast with smaller branch offices primarily dealing in product sales dotted across the company.

While you could have a Martian planted as a security officer, it wouldn't lead to anything particularly interesting as Tony himself is largely operating independently of his company due to not actively running it.