Southern California Edison utility district famously required their office staff to train offshored support staff, and then did replace those office staff with the newly trained offshore workers

Southern California Edison IT workers ‘beyond furious’ over H-1B replacements - Computerworld 2015 -- The incident sparked legislative interest in California, with lawmakers proposing bills to restrict utilities from outsourcing critical infrastructure work and prompting at least 11 U.S. senators to request federal investigations into the use of H-1B visas in such outsourcing deals.