The phrase "seasoned pro" means someone who is highly experienced and skilled in a particular area. They have been doing it for a long time and are very knowledgeable and capable. Full definition
Kids are different - they surf like seasoned pros after about 5 minutes of instruction! (greeniguanasurfcamp.com)
All top squads have a sprinkling of seasoned pros. (justarsenal.com)
Over the past ten years, I've edited award - winning authors and bestsellers, those just putting out their first novels and seasoned pros with multiple series and titles in the dozens. (laurieboris.com)