Qing Quentin Huang, 53, from Waterdown, Ont., appeared in a Toronto courtroom Wednesday, wearing a black shearling jacket over a blue button-down shirt.
He spoke briefly to his lawyers from the prisoner's box before the matter was adjourned to Monday, Dec. 9.
Huang was arrested Saturday, two days after RCMP say they became aware of allegations against him.
He is a Canadian citizen and an employee of Lloyd's Register, a subcontractor to Irving Shipbuilding Inc., and has been suspended without pay until the case is resolved.
Huang is charged under the Security of Information Act with two counts of attempting to communicate classified information to a foreign entity. He could face life in prison.
His lawyer, John Lee, would not comment on how his client is faring or whether he plans to fight the charges.