Yes you can,
Yes he should be able to get out most doors
If you don't remove the door you're ok without the pilots parachute, doesn't mean this is a good idea, but you're legal.
Yes you will need to file a NOTAM, no biggie, just give them the time, altitude, diameter of the area and where it is as a radial DME from the nearest VOR and also nearest airport.
Yes you will need permission from the owner of the land he is going to land on
THAT SAID, you really need to know what you're doing, he really needs to know what he's doing and one of you needs to be able to spot a load, ether have him do it visually or you do it on a GPS, know the winds aloft as your climbing.
Is he a new jumper or a 5,000 jump D license.
ALSO his USPA insurance WILL NOT cover any damage to your plane or anything he hits as you're not a USPA DZ, also doubt your insurance company will cover any damage.
You will want to carry a hook knife and also have him carry one, if he doesn't guard his pilot chute and it deploys after being bumped getting out, I've seen them rip the horizontal stab off a 206.
He should practice quite a bit on the ground, dirt dive the crap out of this.
All said, unless he's a accomplished jumper (C license or above) and unless you have experience dropping jumpers, this has bad news written all over it.
Nearly all dropzone a require new pilots to have 500 hours before they begin jump pilot training, at a good DZ training for a greenhorn jump pilot will last a little while and include about 2 weeks worth of supervised flying with a senior jump pilot or the DZO if he's a pilot.
But hey, if you do decide to do it, record it on a go pro, if things go sideways I'm sure the news will pay a pretty penny for the video.
FYI only reason the idiot landed this 206 vs bailing and letting it go down was he was dumb enough to work for a DZO in South Africa which didn't provide him with a emergency rig.