The US supermajor said last year it planned to ultimately bring its workforce down by between 6000 and 7000 positions amid the worst oil bust in decades.

Earlier this month, the supermajor confirmed cutbacks of 655 people in its Houston office.

So far the headcount is down by about 4000 positions since the end of 2014.

"Our efforts have focused on achieving sustainable reductions and improving efficiencies," Joseph Geagea, executive vice president technology, projects and services, told investors on a conference call this week.

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