I once worked 4 shifts after another. Began with a night shift, did a morning shift because I had an exam at 10 am, then continued a late shift because of a human factors refresher course (!), then continued with my regular night shifts again.
On road trips it can get as worse. Fly in the morning with crew to aog a/c, fix a/c whole evening and night, fly with same crew back to homebase next morning. Only guys that got sleep were crew.
but yeah, engineers do it to themselves, I did learn from that and will ask one day hotel stay in the future.