The energy industry is transforming and Eskom is playing a leading role in the delivery of energy to millions of customers countrywide. Since companies are shaped by its people, we at Eskom are always looking for highly skilled professionals who want to make an impact. We rely on the skill, dedication and enthusiasm of our employees to meet our industry challenges and build a successful business.

Learn more: http://joblistsouthafrica.com/eskom-vacancies-vacancies-at-eskom.html

The listing is good. Surely no harm in trying

However kindly note the following
1. Graduate entry is PRACTICALLY "mission impossible" for non-indigenes (even if you study in SA)
2. Few 'entry' and medium career level are consider for foreigners (especially African) except with a valid work permit (a catch 22 scenario - work offer for permit, permit for work application)
3. Things are more open at management level (though not all rosy). Yet beware of victimisation, non-apparent 'black prove yourself'

Getting work is further compounded by AA (Affirmative Action) and EE (Employment Equity) law and BEE policies. This are kindda similar to the 'local content' law. Proof must be shown for preference for local (Black first, coloured second, indian third, white et al next) before employing foreigners

NB:
Eskom is in the news for a previous recruitment exercise down in the state - http://mybroadband.co.za/vb/archive/index.php/t-213574.html
But hey watch the space as Eskom has a hold on PHCN