The term "old pro" is often used to describe someone who is experienced and skilled in a particular field. However, there are many synonyms that can be used to convey this same meaning. Some alternatives include "veteran," "expert," "master," "guru," "seasoned pro," "wise old bird," "accomplished," "proficient," "maestro" and "legend." These terms all suggest someone who has extensive knowledge and expertise in their field, as well as a long history of success. Whether you're looking for a way to describe a colleague or simply trying to expand your vocabulary, there are plenty of options to choose from when it comes to synonyms for "old pro".