12052 Background: Cancer survivors face unique health challenges with implications on health-related quality of life (HRQoL) and physical, social, and emotional wellbeing. With advancements in cancer treatment and aging populations, the prevalence of cancer survivors is expected to grow prompting the need for improved survivorship care delivery and comprehensive rehabilitative services. Living Life Post Cancer Treatment (LLPCT) is a community-based 12-week program that provides multidimensional support to patients of any cancer diagnosis transitioning from active treatment to post-treatment life. This single-arm intervention study aims to assess the program’s impact on HRQoL and physical activity in cancer survivors. Methods: A total of 125 participants within 2 years of treatment completion were enrolled in a 12-week program comprised of 9 sessions of engaging workshops, personalized exercise training, and nutrition and psychosocial counseling with an interprofessional team of oncology providers, social workers, exercise trainers, and dietitians. The program consisted of 8 consecutive weekly sessions followed by a 1-month follow-up session at week 12. Ninety-six (77%) participants completed the eighth or ninth session of the program and were included in the analysis. A series of questionnaires were administered at baseline and weeks 8 and 12. Primary outcomes assessed were HRQoL using the Functional Assessment of Cancer Therapy-General (FACT-G) questionnaire and physical activity using average daily steps by pedometer and 2-minute step test performance. Results: Among the 96 participants (mean age 60.4 ± 11.7) who completed the program, the majority were female, white, and married. Post-intervention median FACT-G scores significantly increased from baseline at weeks 8 (+8.8, p = 0.002) and 12 (+7.3, p < 0.001). Average daily steps by pedometer increased by 1063 (p = 0.003) and 1233 (p = 0.015) and 2-minute step test performance increased by 18 (p < 0.001) and 21 (p < 0.001) steps at weeks 8 and 12, respectively. Participants reported high levels of satisfaction and improved self-efficacy to incorporate lifestyle modifications. Conclusions: These findings suggest that this 12-week intervention improves HRQoL and step-based physical activity levels in cancer survivors and could serve as a multidimensional model for post-treatment support. Further research is needed to determine if these benefits are sustained long-term.