Dive
See diving in mozambique for details.
teaching
You may be able to find work teaching at a school such as The American International School of Mozambique (http://www.aism-moz.com/?...).
dive shops
If you're a certified divemaster or instructor you could try helping out at one of the dive shops in Tofo Beach, Vilanculos or Ponta d'Ouro.
Universidade Eduardo Mondlane
(http://www.uem.mz) is the oldest and largest university in the country.