A native of South Africa, Renche received her Bachelor of Commerce degree and Diploma in Accountancy from the University of Natal in Durban and was certified as a Chartered Accountant in 1982. Renche received an Advanced Tax Certificate from the University of South Africa and qualified as a Certified Public Accountant in the USA in 1998. She was employed by Deloitte and Touche in Johannesburg. In addition to serving at Knox, Renche serves as Treasurer for St. Paul United Methodist Church in Madeira. She and her husband Andre reside in Madeira.