She was challenged by four other national finalists and was recognised for the team she had developed and the high level of restaurant quality.
Originally hailing from Venezuela, Mrs Farrell joined Nando's in 2005 when she first moved to WA.
She started as a cashier and griller to help pay for her university studies and worked her way up to becoming restaurant manager.
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READ NOWNearly four years ago, she realised her long-term dream and became a franchisee, opening her own restaurant on Marmion Avenue in Jindalee.
Since then she has won the Nando's Rookie of the Year Award in 2012 and was recognised at the WA Multicultural Service Awards in 2013 when she won the Business Migrant of the Year Award.
Mrs Farrell said her success as a franchisee came down to leading by example and building a strong team around her who could deliver a positive customer experience.
"Im very lucky to be surrounded by an impressive team of 20 staff who are as motivated as I am to give the local residents a fantastic experience " quality food in a clean restaurant ," she said.
"Being part of our community is very important to me and my team. Many of our restaurant staff live local, so we're always looking at how we can give back.
"We're working with a few local gyms" we also support our local school fetes."