The phrase "proficient skills" refers to having a high level of ability and expertise in a particular area or task. It means being very good at something and having the knowledge and competence to perform it effectively. Full definition
With my strong beauty expertise and proficient skill in customer service I want to acquire a position of beauty consultant through which I can deliver my beauty related know how to my clients. (sampleresumeobjectives.org)
Your friendly easy going attitude and proficient skills really made my day! (carsdesk.com)
It requires proficient skills, in - depth subject familiarity and sufficient time to draft business environment assignments. (studentsassignmenthelp.com)