While all these words mean "having great knowledge and experience in a trade or profession," proficient implies a thorough competence derived from training and practice.
What is the definition of proficiency? Audience adaptation in the essays of proficient and nonproficient writers.
Proficiently is a word and more precisely it is an adverb.
Many Flemings have always been proficient in French, while Walloons were seldom proficient in Dutch.
Daniel Defoe was knowledgeable and proficient in seamanship, he understood the workings of a ship and the skills required for its operation.
Industry-specific software master is always good to highlight on your resume, too.