They should not mention accomplishments from 10 years ago unless they are extraordinary or the only example of experience that meets the employer's needs. If it is necessary to mention an accomplishment from the past, it should be spoken about as if it happened today. Finally, one should not talk down to, patronize or become convinced that it is impossible to work for a younger manager. It is critical that older job seekers avoid making the interviewer inferior. If there is a problem working for someone younger, it should be resolved immediately because odds are that many jobs will involve working for people who are younger.
Employers hire people they like.
Candor is a preemptive strike that removes unspoken roadblocks and puts the interviewer at ease. Additionally, older job seekers who voluntarily discuss an interviewer's unasked questions distinguish themselves from other candidates.