"He was your first boss" if you are writing/speaking in past tense, like telling a story."He is your first boss" if you are writing in future tense, like writing a guide/walkthrough.If the person is...
Bruce Springsteen, known as The Boss, once said, "When I was growing up, there were two things that were unpopular in my house. One was me, and the other was my guitar." Springsteen got the music bug...