Dr. Contreras-Ulloa is a pastoral psychologist, counselor, psychotherapist, group advisor, teacher, preacher, and speaker. Her expertise is in topics such as: marriage and family, counseling, personality, women, adolescence, life cycle, personal development, grief, Bible and psychology, psychopathology, psycho-pastoral aspects of disease, among others. 

She founded, coordinator, and taught in the Pastoral Psychology Diploma program at the Theological Community of Mexico. She also taught pastoral psychology at the Presbyterian Theological Seminary of Mexico, Lomas Verdes Mexican Baptist Theological Seminary, and the Seminary of Ministerial Training of the Church of God, Seventh Day. Recently, she was incorporated as a professor for the Christian Counseling Diploma at the Institute of Christian Counseling of North Carolina, USA.

At present, Dr. Contreras-Ulloa is the co-founder, director, and teacher at the Institute of Faith and Psychology, coordinating the specialty in Christian Counseling and the Diploma in Marriage Counseling. 

Last, but not least, Dr. Contreras-Ulloa serves as associate pastor with her husband, Rev. Dr. Sergio Ulloa Castellanos of the Baptist Church.