Small Aircraft
Air Traffic Control Fully Certified
Air Traffic Control Time Certified In Pos 1 (yrs) 3
Confusion; Distraction; Situational Awareness; Time Pressure; Training / Qualification
ATC Issue All Types; Airspace Violation All Types; Deviation / Discrepancy - Procedural Clearance; Inflight Event / Encounter CFTT / CFIT
General None Reported / Taken
Airspace Structure; Environment - Non Weather Related; Human Factors
Aircraft requested IFR clearance airborne. I proceeded to find the flight plan and issue a clearance when pilot was out of 2;900 feet when the MIA was 3;000.  This was my first day back in the facility in 4 months due to COVID. Prior to that I worked straight mid shifts for the preceding months. I haven't seen any day/evening traffic since month (8 months). This session appeared complex for me due to my absence. I was told I would have this 1 single day to OJT and then I must get an Over The Shoulder.  Jumping immediately into the job made me overthink a lot and I rushed the clearance without thinking of the MIA.Provide more than 8 hours of OJT prior to forcing people to re-certify. This would make the transition back a little smoother.
Center Controller reported having an aircraft below the Minimum IFR Altitude.