When it comes to merging these two major typology systems: Myers-Briggs and the Enneagram, there is no “one size fits all” method. Truly any type combination is possible making not just 16 personalities or 9 personalities, but 144 different expressions!
Each typology system offers incredible personal insight but is incomplete on its own: where Myers-Briggs delves deeply into cognitive functions and how intricately the brain learns and processes information, the Enneagram offers insight into emotional health, childhood experiences, and basic driving human instincts. Using these typology systems in conjunction will not only give you a better understanding of yourself as a person, but will help shape your relationships and guide you toward a more successful and happy future!
Below you can find a description of the three common Enneagram types for ISTJs.
ISTJ One “The Reformer”
ISTJ Ones are sure of themselves. They have a deeply seeded value system which guides them in everything they do. These types often use their dominant and auxiliary functions back-and-forth in near equal conjunction to embrace tradition (Si) and implement efficient and morally right action (Te). They may be more prone to believe they’re extroverted than other ISTJs because they tend to be more bold in expressing their views. These types should be careful to develop their tertiary Introverted Feeling/Fi function to help them empathize with others and understand their opinion as subjective.
ISTJ Five “The Investigator”
ISTJ Fives are intellectual, reserved types. They embrace the pursuit of knowledge and enjoy researching things thoroughly in order to avoid repeating past mistakes. These types need time before making a major decision and will appreciate others who give them adequate space to figure out where they truly stand. ISTJ Fives will be the most reserved of the ISTJs and need to trust that their auxiliary Extroverted Thinking/Te knows what to do. If they put confidence in Te and lean into this function more, they will develop more boldly as an individual.
ISTJ Six “The Loyalist”
ISTJ Sixes respect and guard tradition. They are incredibly dependable and will be true to their word. Their sense of reliability and loyalty comes from a well-developed dominant Introverted Sensing/Si function and a strong auxiliary Extroverted Thinking/Te function. Si safeguards successful methods that an ISTJ has used in the past to achieve a desired outcome and Te executes behavior in accordance with those views. These types will be conscientious, security-oriented, and very hard-working. They value family life very highly and will do whatever it takes to protect and support the ones they love.
Personality City 