ESTJ Auxiliary Function: Understanding the ESTJs Secondary Introverted Sensing (Si) 

When searching for a deeper understanding of the personality types, it is important to understand each one of their functions. While we often focus on the dominant and even inferior functions, knowing the auxiliary and tertiary ones are also vital. It is not just about knowing what functions each type possesses but rather how these functions behave within the stack. When a function is dominant it will present differently than when it is auxiliary, and so understanding this is truly important if you want to understand each personality type. Knowing each function on it’s own doesn’t really give you a true comprehension of how the personality type is going to utilize  that function. Instead you need to learn more about the placement of each function and how it corresponds with each personality type.

ESTJs are very driven and efficient people who value being able to work hard and get things done. Their dominant function is certainly the one which stands out the most when people first get to know them. While the ESTJs dominant function is truly important to how they respond to the world, their auxiliary function also plays a big role. For the ESTJ their introverted sensing supports the use of their extraverted thinking, working with it rather than against it. This combination of functions is what helps the ESTJ view and process the world the way that they do. Without this functions they wouldn’t be the same practical and direct individuals they are. ESTJs prefer to focus on things they know and understand and this is certainly in large part to their introverted sensing. This is why understanding the auxiliary function and the role it plays is so important in understanding the ESTJ better.

How Si Works

Introverted sensing or Si is very much focused on past events and information. It is a way of processing and storing information from past experiences and using it to understand the present choices which need to be made. The Si dominant user will take in information and filter this through their memories, wanting to compare it to past experiences and things they have a better natural grasp on because they have been through it before. When things in the present do not match what they know about the past, the introverted sensing user wants to compare this further and understand what is not matching up right. If they have stored certain information and recognize that it isn’t aligning with something from the present, they often realize that something is not right and needs to be adjusted. The Si user is excellent at recalling the past in great detail, especially things which truly matter to them. This is why they are often good at remembering dates or special occasions, not wanting to forget something which marks and important occasion to them or their loved ones. 

Dominant Si users can sometimes appear methodical, very focused on the details and wanting to be sure they are making the right choices. They don’t like jumping into things without being certain about their actions, and will take time to compare to the past and what has worked for them. This is why new situations can be a bit unnerving for them at times, since they don’t have much to compare these actions to. They don’t like stepping into things blind and want some means of knowing that they are making the right decisions along the way. This way of thinking does make the introverted sensor very practical, wanting to focus on processes and proven methods rather than imagining scenarios which are unlikely to ever happen to them. 

Auxiliary Si in ESTJs

The introverted sensing in ESTJs helps them to catalog and remember important information over time. They take in every detail and are often great at remembering facts, where others might struggle to recall things. When their minds deem something important the ESTJ holds onto this and stores it away for later. Their introverted sensing works more in the background, taking in facts which their Te collects, and filtering it through past experiences. This helps the ESTJ to make predictions about what they believe will happen in the future as well. Seeing how these situations turned out in past experiences, helps the ESTJ to decide the most likely outcome and the best way to go after the results they desire most. For the ESTJ this Si does make them very goal-oriented people, wanting to uncover the things they want and find solutions to obtaining them. Their Si does connect to the past in a lot of ways, but it also makes them search for ways to acquire the future and lifestyle they want most.

The combination of Te and Si makes the ESTJ a much more grounded and practical person. They know what they believe is right and wrong and don’t want to deviate from this. They can be seen as a bit stubborn at times because of it, but the ESTJ just knows which path to follow and what they believe to be true. They focus a lot on facts and details, and don’t see the point in veering off into a different direction. They don’t like wasting time on things which are more theoretical, since they can often see a clear path of what is proven and known to be true. ESTJs follow these proven methods and prefer them as a means of accomplishing their goals and getting things done with a sense of efficiency and direction. Their Si helps to keep them grounded and focused on the things they want, instead of allowing their minds to wander off in different directions. This doesn’t mean ESTJs lack imagination, it just means they value being practical and getting things done much more. They care about focusing on the tasks and goals which are in front of them, rather than allowing themselves to envision something which is out of reach or unrealistic.


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