Q is TOP SECRET. 5yr How long after the First Q Post to the Last? Was Q renewed?
The Importance of Knowing When Your Security Clearance Expires
A common misconception is that security clearances automatically expire after five and 10 years.
According to Department of Defense directive 5200.2-R, Personnel Security Program: "A clearance or access entry in the [Defense Clearance and Investigations Index] shall not be suspended or downgraded, based solely on the fact that a periodic reinvestigation was not conducted precisely within the 5-year time period for TOP SECRET/[SENSITIVE COMPARTMENTED INFORMATION] or within the period prevailing for SECRET clearances under departmental policy. While every effort should be made to ensure that PRs are conducted within the prescribed timeframe, agencies must be flexible in their administration of this aspect of the personnel security program so as not to undermine the ability of the Department of Defense to accomplish its mission."
https://www.military.com/veteran-jobs/security-clearance-jobs/knowing-when-security-clearance-expires.html