Bob Mulligan is an American astrologer, teacher, author, and founder of The Astrology Company. He has worked as a professional astrologer since 1974, offering natal, compatibility, relocation, and forecasting consultations, along with astrology education and written reports. His approach emphasizes self-understanding, practical decision-making, spiritual growth, and timing, and his work also extends into astrology training through his long-running correspondence school, The Mastery of Astrology.