Kelsick was born in Plymouth, the daughter of Margaret (née Bladen) and Thomas H.
[1] She was educated at Montserrat Secondary School and subsequently worked for the family insurance company, Thomas H. Kelsick Ltd.[1] The cousin of Eric Kelsick, the leader of the Montserrat Democratic Party, Kelsick was a member of the Montserrat Labour Party and contested the 1958 elections – the first woman to run for a seat on the Legislative Council – but lost to Michael Dyer in the Southern constituency by only three votes.
[2] However, she left the party during the term of the council due to disagreements over the appointment of David Fenton as a minister.
Kelsick became Managing Director of the family company and a member of the Montserrat Chamber of Commerce.
[4] She also established a scholarship fund to allow students from poor backgrounds to attend university.