I used to work for Charleston County EMS, from 10/2007 to 4/2008.
The pay starts at around 38k/yr (24/48 no kellys), and you go to a base of around 45k when you make crew chief, which was from 6 months to a year after hire. The top out was around 68k after 10 years or so, I can't remember. they're the sole 911 ground txp provider for the county. You have ALS first response in Mt. Pleasant. The rest is BLS engines. Protocols are decent, and they have RSI. There are 12 hour and 24 hour rigs. The 12's run three on, two off, two on, three off. All units are ALS. Minimal staffing is one EMT, one medic.
Things I didn't like:
Frequent holdovers of 12-24 hours. Every couple of weeks, you were on call, uncompensated, for a 12 hour window. You're only paid of you're called in. Every six months, you're work location is changed. You need to find someone to agree to work for you on OT if you want to use a vacation day. Otherwise, you're SOL. Mandatory 6 hours of CEU's monthly, on your day off. If you're held over for forced OT, you must reschedule on another off day. When you arrive at the ED, you're instantly in service for another call. They use an electronic e-pcr, so you can have numerous uncompleted reports, that you have to figure out on what should be your downtime. There's no promotional list, just whoever the director likes. They're constantly hiring, so that might tell you something. The turnover was high when I was there. It may be different now.
https://jobsweb.charlestoncounty.org/hronline/public/vacancylisting.aspx