Operational security protection is usually provided by supervisors and employees. Employees who are aware of and take ownership in their surroundings and are trained and willing to report or deal with anything unusual are the first line of operational security. Cracks in walls, funny smells, or people who don't belong in an area can lead to serious problems, but can usually be taken care of easily if dealt with promptly and appropriately.
Most Forest Service units already have a sense of cohesion and ownership in their facilities. This can be enhanced by encouraging social interaction such as lunchtime potlucks and by rewarding behaviors that exhibit a sense of ownership of the facility. Supervisors should encourage employees who take initiative in small actions, such as picking up litter or mentioning when maintenance is needed or unknown people are in the area.
The Forest Service routinely offers security training covering a wide range of issues. Self-study training materials are also available, including those developed by MTDC and available on the Safety and Health Products web page (Optional link for FSweb users).
Other operational security measures depend mostly on how employees and facilities are managed. In some areas, it is important that an employee isn't alone in a space such as a reception area where odd people may wander in off the street and harass or threaten the employee. In these cases, supervisors must assure that work is scheduled so two or more employees always occupy the space.
If a public area in a building that conducts sensitive business is often occupied by large groups of people, it may be wise to assure that the receptionist or security guard does not have other duties that would distract him or her from observing the visitors. Constant observation tends to deter visitors from making unauthorized procurements of government property or slipping unnoticed into areas where they don't belong.
Operational security measures may be as simple as visitor sign-in sheets or assuring that keys are not left in motorized equipment. Site-appropriate operational security measures can be determined by site-specific risk evaluation.