A study involving 32 adult persons who are deaf and hard of hearing (DHH) and successful in their jobs explored the key factors for their success. The results revealed that, in particular, social and personal competencies (soft skills) are important. These soft skills include self-confidence, patience, interest, motivation, ability to communicate, and capacities for teamwork as well as a positive attitude to life. The interviewees mentioned these skills in addition to corresponding professional expertise related to their job (hard skills). Further, social support systems in various phases of life (family, friends, colleagues, etc.) are also of great importance for the respondents who are DHH, as well as having specific support (assistance, sign language interpreter, captioner, etc.) and technical support (hearing aids, cochlear implants, frequency-modulated support systems, etc.) were considered helpful. Potential consequences regarding educational opportunities for toddlers and students who are DHH are discussed, in particular for early intervention services and for deaf education.