Carlos Gonzalez will serve in the position for 2013 and 2014.
Firm says it needs to make additional 227 job cuts.
MMDA has required cement trucks to display warning signs while on the road, starting next month.
Silo unit at Calme Group plant hit.
Peter Hoddinott new President, Daniel Gauthier is new Vice President.
CFO Tim Surridge has left company for personal reasons.
Markus Akermann will now sit on the Brazilian firm's board of directors.
Earlier, Bamburi Cement replaced David Njoroge, the managing director of its Ugandan subsidiary Hima Cement.
Some workers stormed the headquarters of GASCO in New Cairo.
Luís Sequeira Martins and Manuel Luís Faria Blanc are leaving the company.
Amran Cement hit with second bombing this year.
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