Chevron to lay off up to 20 percent of its workforce

USA TODAY - For more and to sign up click here Tara Suter Chevron plans to lay off up to 20 percent of its workforce, according to a company spokesperson. Vice Chairman of the Chevron Corp., Mark Nelson, said that the company "is taking action to simplify our organizational structure, execute faster and more effectively, and position the company for stronger long-term competitiveness" in a statement emailed to…