yes!!! put the ieem membership and the GCN licence on your CV! put them in the skills bit and make sure they stand out...
as for getting a job...hang in there. I volunteered for 2 years before i landed a job. i'd join your local bat group (get the experience now, it always helps), and see if you can get onto any residential wardening holidays - lots of experience and usually they provide accomodation. i'd also suggest you have a chat with your local ecology peoples, or even the rspb (i did mostly gis volunteering with them and it turns out to be the one massively transferrable skill that lots of vols and graduates don't have) about what volunteering opportunities there are about. you'd be suprised the types of things you can get experince of with the big ngo's.
i spent a good long while behind bars (in pubs, no in the criminal sense
) and waiting tables (full time at that) while i was voluntering, but its all worth it!
hope this helps - i know its esy for us to say it because we're in alredy, but it really is orth the effort...