Your resume should always include the most relevant information about you that fits the description of the job that you are applying for. Even though you have to treat each resume differently, we highly recommend you to always include the following key elements on your resume:
A concise and professional summary
Your work experience
Educational level
Your relevant professional skills (both soft and hard skills)
Any achievements / awards (think self promoting)
Your goal is to list the above key elements chronologically (reverse chronologically) and in the right order. In our resume builder we have created a set frame that defines the best way to portray your skills and experiences. That's why you can't customize all sections in our templates. A resume that seems to be randomly assembled will not show off your skills in a strong and professional manner and it is utterly important that you treat your resume with professionalism. We've got that covered for you.