Mondher Bouhouche succeeded Kader Maiga last week as head of Vivo Energy Madagascar, a producer and distributor of Shell lubricants. Bouhouche previously served as head of fuels, lubricants and commercial LPG of Vivo Energy Tunisia. Stourport-on-Severn, United Kingdom-based waste lubricating oil collector Slicker Recycling acquired waste oil collector J Vant Ltd. this week.