I think that a job for life is a thing of the past these days & even if you do your full 22 you'll still be in the same position at the end of it looking for a new career (albeit youd be more financially secure).
But it is common for people to move from job to job and the recession has displaced allot of folk who might have previously seen their jobs as secure.
I think i read that 6 jobs before settling in for the long haul was the optimum for employment, you bring a varied experience to a post, any more and you're seen as too erratic....not sure how accurate that is, i do read allot of rubbish.
& unless you're going for a job in a local small company then it is all HR folks who pull the strings and it is them that you need to satisfy. Match yourself to each and every one of their requirements, going off on a tangent about how good you are at something they havent even specified will sound good but still not match you to the job.
Allot of it is down to pure luck & perseverence & taking a few shit jobs along the way.
I did 5 years in comms in the army and when i left at 26, i ended up down shit creek and so i took whatever job was going, i worked for parcelforce for a bit, then as civillian police staff and then i moved to Wales and had to start all over again, ended up on a production line making UPVC windows, rock bottom for me, all these specialist quals and there i was, but it paid a small wage and gave me a reason to get up in the morning and i kept at it on the job hunt and portraying enthusiasm on my appications that quite honestly in reality i had lost. i got into the shipping industry off the back of that enthusiasm, didnt know the pointy end from the blunt end of a ship, but i learned and i worked my arse off doing some crazy hours. Then my current job came up, basically ship version of air traffic control, all the boys saying it was pointless, we wouldnt get it bla bla, most didnt apply, i thought foc it im applying, worked my arse off on my CV and application, got to interview and then got the job......am i lucky, yes...but sometimes you make your own luck, i was 28.
P.S i got my HGV when i was in but apparently you need some new EU crap certificate, pen pushing excercise to be able to use it, whats that all about, something at xmas about loads of drivers retiring because they couldnt be arsd with the new rules and therre was gonna be a shortage of drivers, pile o shit, those petrol tankers are a good job, well over 40k a year i think.