Final answer:
In a workplace scenario, particularly within a sensitive environment such as a Department of Defense facility, encountering an individual refusing to leave or fulfill their duties requires documentation of their behavior, reporting to superiors and possibly security personnel, and considering the broader impact on the organization's operations and reputation.
Step-by-step explanation:
The scenario outlined in the question touches on various aspects of professional and legal conduct within a workplace especially one that involves sensitive occupations like working for the Department of Defense. The unusual presence of an individual refusing to leave the premises requires immediate and appropriate action.
If you encounter a person persistently occupying a space within a leased facility and refusing to carry out the duties for which they were reportedly hired, or refuse to leave the premises, you are faced with a potential security and legal issue. Documenting the individual's activities is a prudent first step, and it is also essential to report the occurrence to your superior and, if necessary, the facility's security personnel.
Depending on the severity and nature of the intrusion, this could lead to liaising with law enforcement. Above all, keep in mind the safety of yourself and those in the facility. It's important also to consider the impact on the business operation and the reactions of other tenants and clients, as such an occurrence could have broader implications for the organization's reputation and functioning.