How does an E6 have 6 service stripes?

There are all kind of reasons, depends on the individual, their MOS, or it can be for disciplinary reasons. You'll have to ask him , I was once stationed at Ft Lewis, in 1982 we had a spec 4 who had almost 20 years in , I wondered the same thing, well it turns out he was a Silver star recipient from the Vietnam era, pretty much untouchable.

As soldiers break into NCO ranks how much more teamwork is put into making sure that the right ones can climb up. Or is it less teamwork involved. It you may have a lot of soldiers that need to attend a meeting though room cant hold them all at once

Some people seem to wiz by the adversity life has to offer some people seem to avoid it and some people get all up in it and make it out and move forward all the way.

Reserve time served as active duty.

I retired as a 1SG. At the retirement ceremony most were SSG. Not bad soldiers but got caught up in a slow MOS or were just happy to be SSG.

I retired as a 1SG but the majority of soldiers at the ceremony were SSG. No shit bags. They just got caught up in the wrong MOS or were happy being a SSG.

PFC O'Hara, great question. I would hope you're question is based on your desire to learn about uniform wear and appearance and NOT rooted in you're desire to pick apart a fellow Soldier. If its the latter you best look for a new career because looking for ways to pick apart your brothers and sisters in no way to go through life.
So lets look at this Staff Sergeant. If you notice he has 6 overseas service bars on his left sleeve, this means he has been overseas 6 times for a total of 36 months ( 6 months per stripe). Also notice what looks like a Combat Action Badge above his ribbons on his left breast. Obviously been deployed and seen some sort of action. Also see the 4th Infantry Division badge on his right breast pocket. Again been deployed with the 4th ID. I don't see any blue so he's not an Infantry Soldier, but maybe Combat Arms. So, being an 18 year Staff sergeant is nothing to be ashamed of and also not really out of the ordinary. A lot of Combat Arms MOSs have painfully slow promotion cycles and minimal upward mobility due to the density of people in those MOSs. There used to be certain gates you had to meet in your MOS career path to remain in the service called Retention Control Points (RCPs). If a Soldier didn't make a certain rank by a certain time frame they would be processed out of the Army. They have been revamped and obviously due to countless years of combat deployments, a lot of MOSs have been backlogged for NCO professional development education so they gates have been waived. I would presume, I never assume anything, this Staff sergeant is most likely in that category. Either way, he does not appear to be a POS. I used to tell my Soldiers two things about appearances, 1) image and perception are reality, doesn't matter how good a Soldier you are. If you act and look like an ate up POS, people will see you as an ate up POS.
I don't know any of the back story about this Soldier or the event but he looks squared away and obviously put in time on deployments which is more than the majority of our Soldiers can say. Again, this doesn't mean a POS can't dress and act professionally and still be a POS but the odds are they are good troops. Long story endless, do some soul searching and check out the Army Regulations regarding uniform wear and appearance. Also go ask your S1 personnel NCOs about promotion rules and timeframes for your MOS so you'll know what going on with your career. I don't know where you are stationed but take a look around your formation next time and ask some of the SSGs how long they've been in the Army.

PFC O'Hara, stick around long enough, you just might be that E-6. The MOS has everything to do with promotions once you reach E-6, as does your physical profile. I opened my mouth and stuck my foot in it when I was an E-6, and mentioned to some co-workers, that I'd be ashamed to retire as an E-7. My attitude and mouth kept me from being promoted to E-8.

Yep, O'Hara's confused.

One of the main reasons I got out in 99 was because I did not want to spend 18 years in and not be able to retire due to reaching my RCP. So yes an E-6 in a MOS with high promotion points and a crap ton of E-6 Soldiers all going for that E-7 could have 6 service stripes. Read your regs before asking a question like this.