ISTJ personality

The ISTJ personality is the second most frequently occurring Myers-Briggs type. People with this personality tend to be loyal, logical, dependable, and faithful.

I am not an ISTJ, however, one of my former bosses was. He was always the first to arrive at work, and the last to leave. I will never forget the image of him sitting alone in an empty office at 10 pm on a Friday. His dedication and reliability made me realize how gorgeous this personality really is!

I admire how ISTJs always take responsibility for everything they do. It doesn’t matter whether the task is small or large, they are always there to lead the way. Their individualism and logic make them ideal leaders.

Logic is the ISTJ way

There are no assumptions with ISTJs. Their analytical skills are so precise, that when they set their mind to do something, it will be done. Period. Also, they don’t tolerate unnecessary facts, and don’t have patience with indecisive people. My former boss had this great quality, which I still admire to this day.

ISTJs thrive when working alone, as do the majority of introverts. However, when their position enables them to have a positive impact, the magic begins. No stone will be left unturned when an ISTJ is seeking a solution. Their integrity and honesty is what makes all the difference.

Integrity is their guiding star

ISTJs value integrity above all else. This is that one trait that stands out among many other great ones. When an ISTJ makes a promise, it will be done, no questions asked. They will never break their promise. They push themselves beyond the limit to help anyone they can.

A person who has an ISTJ personality type does not typically give second chances. When someone betrays their trust, ISTJs do something, which is similar to the “INFJ Door-Slam”. That person is gone from their lives, and will have an extremely hard time returning.

The ISTJ personality at work

ISTJs are a functioning core of every company and office. Even though they excel at personal relationships, the office is where they feel most at home. They are those little working bees that stay up late and finish the job. They are those ant workers who sacrifice their well-being in order to help a co-worker.

The efficiency with which they accomplish their assignments is absolutely magnificent! No other personality type can compete with the accuracy and precision of their work.

There was another classic ISTJ quality I saw in my old boss: dependability. He was the first person who approached me when I arrived. Even though he was busy, he spent hours assisting me with my first office project.

In all honesty, there are few personality types who are as dedicated as ISTJs. They are those creative wheels that keep the world spinning, using sheer determination and dedication.

Famous ISTJs

There are countless famous ISTJs who’ve shared their bright light and made a difference. Here are a few of them:

Denzel Washington
Natalie Portman
Matt Damon
Anthony Hopkins
George Washington
Eddard Stark (for all the Game of Throne fans ☺ )
Angela Merkel
Condoleezza Rice
Hermione Granger (and one for HP fans ☺ )

Please feel free to share your experiences and thoughts about this wonderful personality in the comments below! ☺



Hi, I’m Marko, the Introvert Spring INFJ forum coordinator. I’m a writer and marketing expert, with a rich background in leadership and communications. Right now, my biggest passion is helping to grow the Introvert Spring INFJ forum, so INFJs have a place to feel seen, understood, and inspired.