Your career is not over nor unachievable by any means. Time that has passed since, circumstances surrounding the conviction and current conduct in the last 5 years will be most determining in their decisions. I myself have been convicted of simple misdemeanors when I was young and have been employed by 3 121 Carriers. Disclose all your information, what you have learned from it and constructivly sell yourself and your lifes current character. However if you fail to disclose you "WILL" be terminated if hired and you will destroy your reputation in this indusrty and label yourself as an un-trustworthy employee to any potential employer.