In this theoretical work-in-progress paper, we present Employ-STEM, a mentored employability model for science, technology, engineering, and mathematics (STEM) majors which integrates foundational concepts of experiential learning to enhance students' educational experiences beyond the classroom, develop employability skills, and culminate in employment. The premise of this model is that, under the guidance of a faculty mentor, students benefit from three main learning opportunities: 1) experiential leadership development, which requires placing students in opportunities that allow them to practice leading; 2) service learning, which provides opportunities for learning through interactions with communities, schools, and non-profit organizations; and 3) experiential learning, which covers work-integrated learning, internships, apprenticeships, and other hands-on activities. These engagement opportunities are consistent with Tinto's theory of student integration, which postulates that academic and social integration are key factors for increasing student persistence and graduation. Through a synthesis of the main facets of these theory-based approaches, we will: 1) describe an employability model for STEM majors, 2) illustrate important elements of this model; 3) share two vignettes which incorporates elements of the Employ-STEM model; and 4) identify next steps to improve and test the model.