The knowledge of what career to specialize in could be a late discovery for adults who have traded their youthful years through several professions/vocations but found no fulfillment. On the other hand, it could be a strenuous exercise for children and youths who are exposed to different academic areas. The aim of this project is to develop a career-advisor expert system based on Myer-Briggs Personality Assessment. It advises the user based on his/her personality. This is achieved through the method of creating facts from the Myers-Briggs Type Indicator (MBTI) thereby mapping them to common Careers using a rule-based system based on the sixteen Personality Types (according to Myers-Briggs). All these facts and rules form the database whereas―Prolog‖ which stands for―Programming in Logic‖ is the tool used for the implementation. The results of the query determine whether an advisee should choose a particular career or not. It displays―true‖ if he/she could choose the predetermined career and―false‖ if he/she should not. The results equally lists the possible career paths an advisee could follow. For example, when asked the career that someone with the personality trait of Introversion-Intuition-Thinking-Judging can pursue, it advises the following careers: Scientist, Engineer, Professor, Teacher, Medical Doctor, Dentist, etc. In conclusion, this expert system would minimize cost, alleviate career problems and always provide reliable career advice void of human error. Meanwhile future work can focus on the engineering of other models that can influence the choice of career other than the complex personality trait.