Proficient
A person can be referred to proficient when he or she is well advanced in a particular occupation, any type of art, or a specific or certain branch of knowledge. They usually possess and display an exceptional knowledge, enhanced experience, or increased skill in a field of their endeavor. A proficient person is a result of his constant striving, who had felt an urge to develop the efficiency and have successfully done it. They have increased self awareness and self confidence. These factors help them to get through the difficulties that the situational factors or situational variables pose before them in the process of reaching their goal. The skills acquired by them are utilized in various ways and is most of the time very much useful to themselves as well as the society. Therefore, a person who is proficient in a certain field is an asset to the society.