By Bryna Jean-Marie The Tide’s deputy athletic director and chief diversity officer rolls up her sleeves to make sure everything behind the scenes is a success. Sports Illustrated and Empower Onyx are putting the spotlight on the diverse journeys of Black women across sports—from the veteran athletes, to up-and-coming stars, coaches, executives and more—in the series, Elle-evate: 100 Influential Black Women in Sports. Tiffini N. Grimes was 16 years old when she connected with her purpose in life. She had been a briefcase-toting toddler, foreshadowing her innate businesswoman and attorney attri…