ISTJ’s are responsible, loyal, stable, practical, down-to-earth, hardworking and reliable.  They can be depended upon to follow through with tasks.  They value tradition, family and security.  They are natural leaders who prefer to work alone but can adapt to working with teams if needed.  They like to be independent and have time to think things through.   They are able to remember and use concrete facts and information.  They make decisions by applying logic and rational thinking.  They appreciate structured and orderly environments and deliver products and services in an efficient and orderly way.