Jerry is a skilled engineer, yet he has trouble holding down a job. in his performance evaluations, it is often mentioned that he has difficulty resolving conflicts and functioning as part of a team. it is most likely that jerry lacks:

Emotional intelligence

Explanation:

Emotional intelligence refers to ability to perceive and regulate one's  emotional experiences and to identify, interpret and react to other people's emotional responses in an appropriate manner. Consequently, Jerry's lack of emotional intelligence makes him unable to recognize and understand his own feelings as well as the feelings and reactions of the people who work with him.