The University of Guelph Master of Public Health program is a professional degree program that seeks to prepare graduates to meet complex public health needs by developing their proficiency in the 36 public health core competencies. Provision of experiential learning opportunities, such as a semester-long practicum, is part of student development. In the Fall 2013 semester, a new opportunity was introduced in which small groups of students were paired with local public health professionals to complete a capstone business plan assignment that addressed a current public health issue. However, the impact of this external collaboration on the student learning experience was unknown. To address this, quantitative and qualitative information about students' perceived proficiency in the core competencies and their learning experiences was collected using a pre/post survey and focus groups, respectively. A post-assignment survey was also administered to participating local public health professionals in which they assessed their group's proficiency in the core competencies, and provided additional feedback. The results of this study showed that students had unique learning experiences with enhanced proficiency in different areas including policy and program planning, implementation and evaluation, assessment and analysis, and partnerships, collaboration and advocacy. Managing and communicating expectations was important throughout the learning experience. By using realistic community-based assignments, graduate public health programs can enrich students' learning experiences by creating an environment for students to apply their classroom knowledge and gain practical knowledge and skills.