Steve Sires has been impersonating Bill Gates for a decade now, and following him into retirement might not be any different.

Click to see: Steve Sires impersonates Bill Gates

Sires, who has a trademark on the name Bogus Bill, is toning down his second career, looking only to cherry-pick assignments that either pay well or bring him to a part of the world he has not seen.

The real Bill Gates is doing the same, including semi-retirement and travel to other parts of the world, even if his goals for those trips are somewhat different. He will leave his full-time post at Microsoft on July 1 to work full-time for The Bill & Melinda Gates Foundation, the world's largest charitable foundation.

Sires, who is a dead-ringer for Gates -- especially when his hair gets a little longer and scruffier than usual -- no longer has an active talent agent, although his Web site remains online. He still lives about 45 minutes north of Gates, but despite numerous gigs he has worked for Microsoft as a stand-in for the chairman, he has never met him personally.

Click to see: Real Bill Gates or "Bogus Bill"?

The alignment with Gates' retirement is happenstance. "I am basically winding it down," Sires says. "It's more coincidence than purposeful. I think it has run its course."

But what a course it has been: paying gigs in Greece and Singapore, film work and commercials, that all added up to good supplemental income for him (couch-cushion change for the real Bill) -- but not enough to quit his day job as a civil engineer His minimum fee just to appear is $2,500, an amount he says keeps lunatics from trying to hire him for their beer bashes.

And all this for a guy who 10 years ago didn't even know who Gates was until his wife mentioned an ad in the local paper seeking a Gates look-alike. She pressed him to answer, and when he didn't, she did it for him. After a couple of weeks and phone calls from the agency, Sires went down for an interview -- and the rest is history. 

His most dramatic Bill-gig was playing the Microsoft co-founder in a 2002 mockumentary about police misconduct and cover-up in Los Angeles called "Nothing So Strange." In the graphic opening scene Gates/Sires is fatally shot in the head by an assassin and lies bleeding in the street. Sires, who is three inches shorter and two years younger than the 5-foot-11, 52-year-old Gates, says mockumentary director Brian Flemming still gets asked how he ever convinced Gates to appear in the film.