The Information and Communications Technology (ICT) field is rapidly changing in dramatic and disruptive ways. To feel up to date, competitive, and efficacious within such a dynamic and demanding field, many ICT professionals depend on informal learning resources at the workplace. The responsiveness, flexibility, and boundless nature of these informal learning resources can provide affordances for ICT workers that are not always as prevalent in more traditional forms of learning and instruction (Cross, 2007; Eraut, 2000; Etling, 1994). This study explored the relationship between frequency of access to informal learning opportunities and occupational self-efficacy among a group of ICT workers at a large university. The current study used a Mixed Methods Sequential Explanatory design to answer the following research question: What is the nature of the relationship between ICT worker occupational self-efficacy, years of professional ICT experience, and workplace informal learning frequency? Results showed that workplace informal learning was related to an increased sense of occupational self-efficacy. It is hoped that these findings can help inform both research and practice.