March 29 (Reuters) - Sierra Metals Inc
* Sierra Metals Inc. announces resignation of president and CEO
* Sierra Metals Inc - Mark Brennan has tendered his resignation as president and chief executive officer.
* Sierra Metals Inc - Brennan will continue in his current role for a period of 30 days to facilitate implementation of an orderly succession plan
* Sierra Metals Inc - Brennan also resigned as director of company effective immediately Source text for Eikon: Further company coverage: