Update: I really dislike this chair. After sitting in it for so many hours because of stay at home orders, I've realized how terrible this chair is. It wobbles from side to side, and I'm constantly tightening the screws. After 2 months of 8-5, the padding is completely worn down--not that there was much to begin with. I did get it to tilt, so that's not a problem now, but I cannot recommend this chair, and I'm actively seeking a replacement. 
It's extremely firm and I can't get it to tilt.