Hospital employees may experience occupational stress and burnout, which negatively impact quality of life and job performance. Evidence-based interventions implemented within the hospital setting are needed to promote employees’ well-being. We offered a 4-week Mindfulness-Based Cognitive Therapy group program for hospital employees, and used a mixed-methods practice-based research approach to explore feasibility, acceptability, and effects on stress and burnout. Participants were 65 hospital employees (Mage = 44.06; 85% white) who participated between September 2015 and January 2016. Participants completed validated measures of stress and burnout before and after the program, and answered open-ended satisfaction questions after the program. Groups consistently enrolled at least 10 participants, but attendance rates declined across sessions (76% at session 2 vs. 54% at session 4) due primarily to work-related scheduling conflicts. The program content was acceptable as evidenced by high perceived value (M = 9.18 out of 10), homework compliance (51% practicing at least 3 times/week), and qualitative requests for program expansion. There were large, statistically significant decreases in stress (ΔM = 2.1, p < .001, d = .85) and medium decreases in burnout (ΔM = .46, p = .01, d = .57), which were supported by qualitative themes of improved self-regulation and mindfulness skills, stress reduction, emotional well-being, and improved work productivity and patient care skills. Findings suggest that 4-week MBCT is acceptable and useful for hospital employees, though research is needed to identify alternate delivery methods or strategies to enhance session attendance.