I've never experienced this as a candidate for employment. In fact, usually the comment is the opposite - that my wealth of experience is advantageous. I have always gotten hired (the last job I had I got at age 51). As a hiring manager, this is not something that has come into play. In fact, if ageism could be said to exist you could say I have had a bias against young people. I just don't feel they have the work ethic a more mature person has. Neither do they have the life experience. I have hired young people but I admit that given the choice between an experienced and motivated old person and the younger inexperienced candidate I will gravitate to the older.

That is not to say ageism doesn't exist however. It could be the sort of jobs you are applying for. I imagine the tech industry would probably tend to have this happen more frequently. Facebook meanwhile is in the news right now as some firms and recruiters are using the platform to target younger subscribers. In Canada legal action is actually being pursued.

There are things I think you can do. On your resume I would draw attention to that wealth of experience you have as an advantage. You could point then to your ability to learn and Master skills. You could also point to training or experiences you have had in your career that suggests you keep your skill and knowledge level current. Point out your maturity level and that you are strongly motivated with highly developed interpersonal skills for example. A very important characteristic worth mentioning too is that you possess a strong work ethic. Do what you can then to point out your maturity and experience are an advantage.

Get yourself and your resume seen. I suggest Linked-in and Indeed as very good sites to put up your resume and profile. My boyfriend is a still employed senior citizen at age 66 and is constantly getting job offers and invitations to interview after recruiters and would be employers see his profile on Linked-In.