if you sit a lot for work you may need to perform sets of stretches to activate (wake) your glutes. My preferred stretch is lying on my front, raising one lower leg to point upward, kicking the leg up towards the ceiling, and holding it there for a sec to squeeze. There are more dynamic exercises to achieve the same which i've found to be just as effective
leaning your upper body forward as you squat may also help you target your glutes and posterior chain in general