U.S. Silver Corp. recently announced the retirement of CEO Tom Parker. He will remain on the board of directors until the corporation’s annual shareholders’ meeting anticipated to be held in June 2012 and will also be available on a consulting basis. Gordon Pridham, executive chairman, will act as interim CEO and Steve Long will remain COO.

Nuinsco Resources Ltd. and Ocean Partners Holdings Ltd. have appointed Roland Horst CEO of C-Bay Minerals Inc. C-Bay, 50% owned by each of Nuinsco and Ocean Partners, was created to advance the exploration, mining and processing assets located in and near Chibougamau, Quebec.

Century Aluminum Co. has appointed Michael Bless president and CEO.

Ruby Creek Resources, Inc. announced Rob Slavik, a director and former CEO, has resigned, but will continue as a director and consultant to the company. Dan Bartley has been promoted to CEO.

PMI Gold Corp. has appointed Michael Gloyne COO.

De Beers has appointed Gareth Mostyn CFO.

Andre Sougarret, who led the rescue of 33 miners trapped at the San Jose mine, has been appointed the general manager of Minera Esperanza, a subsidiary of Antofagasta Minerals. Antofagasta Minerals also announced the appointment of Christian Thiele, the current general manager at Minera Esperanza, as the development manager for the expansion project at Minera Los Pelambres.

ANDINA Minerals Inc. has appointed Dr. Annick Chouinard vice president of exploration.

Golden Minerals Co. has appointed Warren Rehn vice president of exploration. The company also announced the retirement of Robert Blakestad as senior vice president of exploration.

Riverstone Resources Inc. has appointed Peter Carter vice president of engineering.

Ausgold Ltd. has appointed Dr. Andrew Tunks CEO.

North American Palladium Ltd. has appointed Dr. David C. Peck head of exploration.

Pan American Goldfields Ltd. has appointed Hernan Celorrio to its board of directors. He is a lawyer, with expertise in Argentinean mining law. The company also appointed Dr. Fedor Zhimulev chief exploration geologist.

Westridge Resources Inc. has appointed Bill Radvak chairman of the board. The company also announced Dennis Mee has resigned as a director.

Ressources Appalaches has appointed Jean-Claude Morel executive vice president.

Gulfside Minerals Ltd. has appointed Phillip Thomas vice president of exploration.

Komatsu America Corp. has appointed Rod Schrader CEO and vice chairman. He replaces Dave Grzelak, who is stepping down as CEO, but will remain chairman of Komatsu America until the end of June 2013. Ivor Hill, currently vice president of service, has been promoted to vice president and general manager of the mining division.

Star Gold Corp. has appointed David Segelov chief development officer.

Peabody Energy has appointed Bradley E. Phillips senior vice president of transition services in Australia. He will continue to lead the organizational integration of Macarthur Coal and Peabody Energy Australia.

Parsons Brinckerhoff has appointed Guy Templeton president and COO. He succeeds Chuck Kohler, who was appointed to the position in July 2011 on an interim basis. Kohler has been appointed group director of operational delivery for Balfour Beatty, Parsons Brinckerhoff’s parent company.

Centaurus Metals Ltd. has appointed Alexandro Avila de Moura general manager of operations and Antonio Celso Pereira general manager of logistics.

Anooraq Resources Corp. has appointed Dawid Stander managing director of Bokoni Platinum Mines.

Tetra Tech, Inc. has appointed Nick Michael senior mineral economist in the Mineral Resources Group and Thomas Young project manager in the Mineral Resources Group.

CH2M HILL has appointed Bob Kleinmann, Ph.D., senior mining technologist and Marek Mierzejewski a sector leader with responsibility for the firm’s water for mining business.

Flexco recently appointed Bob Lord and Chris Poe to product management roles. Lord will focus on Flexco’s global transfer chute program and Poe will support the CoreTech roller line.

Mine Site Technologies has appointed Igor Korolev vice president for Europe, Russia and Central Asia; Brian Musfeldt vice president of finance (USA operations); Max Leclerc general manager of Latin American operations; and Hendrik de Meyer regional manager of Africa.

KBR has appointed Karl Roberts senior vice president, Canada operations.

Blastcrete Equipment Co. has appointed Maury Bagwell general manager.

Double Coin Tires and China Manufacturers Alliance LLC has appointed Les Garner western region off-the-road sales manager.

Cellular Concrete Solutions has appointed Dennis Dunham vice president of the mining division.

Norman Cay Development, Inc. has appointed Ralph Shearing geological consultant. He will also join the board of directors.

BJM Pumps has appointed Kelly Leth western regional sales manager.

Enerpac has appointed Anders Mangen global mining market manager.

Oniqua MRO Analytics has appointed Brett Roveda vice president of business development for the Asia-Pacific region.