Air Traffic Control Fully Certified
Air Traffic Control Time Certified In Pos 1 (yrs) 7
Communication Breakdown; Distraction; Situational Awareness; Training / Qualification
ATC Issue All Types; Airspace Violation All Types; Deviation / Discrepancy - Procedural Published Material / Policy
General None Reported / Taken
Environment - Non Weather Related; Procedure; Human Factors
I was providing OJTI for the first time since the COVID lockdown. My trainee was on his first day back training. Aircraft X was doing practice approaches at ZZZ. When they were done; they came off [Runway] XXR heading. My trainee gave them their clearance to ZZZ1. Aircraft X read back all correctly except for the altitudes which my trainee promptly reissued. At that time; I had to turn Aircraft Y onto final at ZZZ2 as my trainee did not do in a timely manner. We then had a call from ZZZ3 and a request from another aircraft back to back. I failed to realize that Aircraft X did not enter their new squawk code and thus did not tag up in STARS. They ended up flying for 98 miles without a handoff or point out to other sectors at 12;000 feet. This can only be attributed to not having provided OJTI for the past 6 months. Otherwise if I had been working the position by myself this probably would not have happened.I would recommend a redoubling of effort to scanning while providing OJTI or while performing CIC duties for OJTI.
TRACON instructor reported an aircraft departing and not squawking; flying close to 100 miles through various different airspace at 12;000 feet.