A security check on a US company has reportedly revealed one of its staff was outsourcing his work to China.
He reportedly paid just a fifth of his six-figure salary to a company based in Shenyang to do his job.
Operator Verizon says the scam came to light after the US firm asked it for an audit, suspecting a security breach.
According to Andrew Valentine, of Verizon, the infrastructure company requested the operator's risk team last year to investigate some anomalous activity on its virtual private network (VPN) logs...
The employee, an "inoffensive and quiet" but talented man versed in several programming languages, "spent less than one fifth of his six-figure salary for a Chinese firm to do his job for him", Mr Valentine said.
"Authentication was no problem. He physically FedExed his RSA [security] token to China so that the third-party contractor could log-in under his credentials during the workday. It would appear that he was working an average nine-to-five work day," he added.
"Evidence even suggested he had the same scam going across multiple companies in the area. All told, it looked like he earned several hundred thousand dollars a year, and only had to pay the Chinese consulting firm about $50,000 (£31,270) annually."
The employee no longer worked at the firm, Mr Valentine said.