Eskom Holdings will extend its strategy of trimming top executive positions to include lower ranking managers and finally the general workforce as South Africa’s cash-strapped power utility looks to cut costs, according to a person familiar with the plans. The state-owned company last month reduced its highest executive structure to nine positions from 21 by regrading and combining roles. The next phase is to cut a 600-strong layer of managers – known as E-band employees – by at least 70%, according to the person who requested anonymity because the information isn’t public.