Try checking in the e-gov site for UAE to see if his profession entitles him (and sponsored group) to get VISA on arrival.

http://www.uaeinteract.com/travel/visas.asp

Or contact ETIHAD and deal with them for plane tickets and visas. Or in the end contact the embassy for details/further actions.

Fees are (approx) 185 qar per visa per person (a little bit less as per the exchange rate) but is a figure.

Regards!!

PS: next time try googling for it...it's faster and easier to get info than to sit anmd wait somebody to read here and answer back