I flew large air tankers for a company founded by military pilots, and managed by military pilots...including the owner, president, chief pilot, etc. They were quite adamant that they wouldn't hire military pilots, and wouldn't hire airline pilots, if that tells you anything.
The industry has changed over the past few years. What I have seen as a general rule, however, is that those two pilot groups, far apart from any other, are the least willing to work, least willing to accept change (in a world that is VERY different from their own), and few are willing to do the simple things like scrub and wash their own airplane, clean off the retardant, etc. It's a different lifestyle, and few make it from that arena.
The largest pool of fixed wing tankers presently are the Single Engine Air Tankers, and these are also the single hardest in which to find employment. You'll need a thousand hours of ag time at a minimum, and most places won't hire you to fly ag without that, either. You'll also need time in type, which is very difficult to get, as most are single seat airplanes, and there are really no schools to put you in one. Without solid large turbine tailwheel experience at low level behind you, that area is virtually closed.
The heavy tanker market still has a lot of qualified pilots out of work. Considering it can easily take ten years to upgrade and to make a qualified, carded Initial Attack pilot, companies can't just take anybody off the street, and the line of qualified pilots seeking work is long.
Helicopter work requires mountain experience and long line experience, and today a lot of military pilots are looked upon unfavorably...if you've come from a place where you can lose an engine in your blackhawk and keep on chugging, then your mind isn't prepared for flying an L-3 or OH-6 into a fire in high winds and steep terrain, with limited performance, few escapes, low visibility, strong (severe) turbulence, and no place to autorotate.
Where the majority of the civil helo pilot population used to be military, it's no longer the case, and while military training is always a plus, military experience isn't always looked on favorably...especially for those coming from the Blackhawk or Apache community. I'm not talking them down, just telling like it is.
That said, pilot opportunities in the business, especially in helicopters, are at an all time high, and despite any positive or negative views, if a guy wants job in a helicopter and has the OAS minimums and the long line experience, he will probably find one.
Air Attack positions come in all kinds of flavors, but as 414Flyer said, it's as good a place as any to start, for the fixed wing pilot.