By day, mild-mannered Joshua Holt is a Big Law associate representing private equity firms in multimillion-dollar deals. By night, he’s The Biglaw Investor, a mysterious blogger on a mission to prevent young lawyers from falling prey to their own lousy money management.

A sixth-year associate in Goodwin Procter’s New York office, Holt since May has run The Biglaw Investor website anonymously—at least until now. The site and its newsletters aim to provide financial tips for Big Law associates, many of whom start their careers at a $180,000 annual salary with little knowledge about how to manage it.