I stumbled upon these sites in the papers some hours ago, pls check 'em out.
http://ahmedzakari.com/careers.php?car=home
http://www.jobs.ecowas.int/en/static/
http://www.soft-alliance.com/careers.php
http://www.nwag.org/docs/NWAG_Scholarship_for_Nigeria.pdf
do hurry, some are very near to their closing dates.