In all careers, there are both hard skills and (blank) skills that are important for success.

In all careers, there are both hard skills and soft skills that are important for success.

Explanation:

Hard skills refer to skills that are measurable and can be taught. For example writing, technical skills, math and etc whereas soft skills are those which are not measurable and exist within an individual. For example communication skills, etiquette, work ethics and etc.

An employee must have a combination of soft skills and hard skills in order to excel in their career.