I'd say you have a point when talking about wholesale outsourcing of an entire division to a private contractor. But individuals who report to managers which are government employees are not a consequential risk.
Even then it isn't quite espionage that's the problem but simply working to steer more business their way - inside information on operations feeds into the lobbying arm of the contractor and the lobbyists convince congress to create or expand the work available for which the contractor has a high probability of winning the bid.
Even then it isn't quite espionage that's the problem but simply working to steer more business their way - inside information on operations feeds into the lobbying arm of the contractor and the lobbyists convince congress to create or expand the work available for which the contractor has a high probability of winning the bid.