The Herald can reveal the blonde beauty (25), who previously dated showjumper Cian O'Connor, has relocated to England after being offered a contract with the British station.
The TV3 girl will begin her career with the sports network where a mixture of football and glamourous blondes are used to lure in the punters.
The photogenic presenter clearly has a lot to become accustomed to, given the high-pressurised environment at the news station.
"British TV is very different to my experience of Irish TV. They have much bigger budgets and it's a lot more exacting, especially on a 24-hour news channel," said friend Jacques Malone.
"Things are far less relaxed and the pace is much faster, so it's a lot to get used to and so much to learn.
"She has been spending time with the camera crews and production teams in the first few days learning all about how the station operates. It's a brilliant opportunity for her and she's going to give it her all," he added
Kildare-born Rachel is no stranger to fans of Sky Sports, given that she previously fronted an equestrian programme for them, covering show jumping events all over the country.
She cut her teeth on a string of Irish programmes, including TV3's Irish motoring show Xcelerate.
She's a graduate of the Institute of Art, Design and Technology in Dun Laoghaire, with a degree in Business Studies and Arts Management.
Rachel is also a talented equestrian star and has competed internationally for Ireland in two European showjumping championship teams.
But all this hard work means that the leggy blonde has little time for romance, despite being surrounded by hunky racing-car drivers and professional athletes.
Rachel, who also dated Matt O'Donoghue, has insisted that she's still single this summer and is intent on concentrating on her career.