Former Serco Inc. employee Darryn Kelly accuses the company of falsely billing the Department of Homeland Security and the U.S. Customs and Border Protection on contracts for the Advanced Wireless Systems (AWS) “virtual border” project. The AWS project calls for the installation and upgrade of cell towers along the U.S.-Mexico border. Kelly claims Serco submitted invoices that included claims for work done by Serco employees outside of the AWS project, claims for non-existent work, and overbilling for partial days of work. Kelly estimates that the government has sustained damages in excess of $10 million. He also claims whistleblower retaliation.