With more than two decades of tourism and leadership experience, Charles-St. Jules most recently served as US account manager for the Anguilla Tourist Board.
She has also previously held various executive positions at the Saint Lucia Tourist Board and spent two years as the tourism planning officer for the Saint Lucia Ministry of Tourism.
Charles-St. Jules said she considered it "a distinct honour and a privilege" to take up the role.
"I aim to leverage the valuable expertise, insights and connections attained through my various private and public sector roles in our key tourism source markets, for the benefit of Saint Lucia as a tourism destination and a nation," she added.
"This appointment brings me an added layer of personal fulfillment as it provides an avenue for me to continue to give back to in a significant way to my homeland through our lifeblood industry of tourism."
Charles-St. Jules will be responsible for the overall management of the SLTA, including oversight of the development of the authority’s marketing and destination services, and general administration.