US: Jim Williams, the vice president (corporate purchasing and supplier relations) of Motion Industries, has been elected as the president of the Power Transmission Distributors Association (PTDA) in 2018. He will assume the role in January 2018. He succeeds Tom Clawser.

Williams has been a PTDA volunteer since 2005 when he joined the Motion Control Task Force. A past chair of the Programs and Products Committee, he has served on the Board of Directors since 2015.

Nigeria: Onne Van der Weijde, the chief executive officer (CEO) of Dangote Cement, has decided to step down. He will leave the post at the end of 2017 to return to his home country of the Netherlands. He has served three years in the role. Following the departure he will be appointed as a non-executive director with effect from 1 January 2018.

Until a successor is appointed, JO Makoju, Honorary Adviser to the chairman and former managing director of Lafarge WAPCO will be the acting managing director and CEO of Dangote Cement.

US: Geoff Hynes has been appointed as the president and chief executive officer (CEO) of Rexa. He succeeds Sam Lalos who will retire at the end of 2017. Lalos has held the post for five years. Rexa produces actuators for a variety of industries, including the mineral processing and mining sectors.

China: Huang Ting has been appointed as the chief financial officer (CFO) of China Resources Cement. He succeeds Lau Chung Kwok Robert who departed from the post on 20 October 2017. Lau will remain as an executive director of the company.

Huang, aged 48 years, joined the group in July 2003 and has held various management positions with the company, including financial controller since May 2012, general manager of the finance department in 2011 and 2012 and Deputy General Manager (Guangdong) from 2008 to 2011. He graduated from Xiamen University with a bachelors degree in economics in 1992.