If I wanted to provide a professional description it would looks similar to this:
Jack has a Bachelor of Arts degree in journalism from California State University Northridge. He has been writing for print and web publications for more than twenty years, covering a wide range of topics including: business, technology, parenting, politics, education, sports and religion.
That is far too serious so I prefer to use something like:
The Jack B. is a writer and author of 39 unpublished books and three screenplays. A former athlete and would be superhero he still fights for truth, justice and the American Way. Though he may look like a grown man, don’t fool yourself he is still a boy at heart. When he is not engaged in Walter Mitty like fantasies he is a husband, father and friend.