Yes, it is possible. Essential job functions are a key factor in matters of the Americans with Disabilities Act (ADA). Employers should offer reasonable accommodations to employees who need them to complete the essential functions of their job. If an employee cannot perform the essential functions of their job with or without an accommodation, then they are not qualified for the job. Employers who fail to offer a reasonable accommodation to an employee who requires one, or employers who disqualify a candidate based on a function that is not truly an essential function, are subject to penalties or other courses of action from the Equal Employment Opportunity Commission (EEOC), which is responsible for enforcing the ADA.