Abstract: Objectives: The transition to adulthood poses distinct challenges for young adults with autism spectrum disorder (ASD) (ages 18-25), particularly in establishing and achieving long-term goals. This is further complicated for those within the military and veteran communities. This study aimed to evaluate the feasibility, acceptability, and cultural fit of "Launching! to Adulthood," a 12-week telehealth intervention, adapted for military-dependent young adults with ASD and their military/veteran parents. Methods: Building on previous research and incorporating stakeholder feedback, the intervention addressed key transition challenges such as executive functioning, mental health, vocational skills, and social engagement, while also aligning with military cultural values. A total of 20 young adults and 37 parents participated in the program. Results: Feasibility was demonstrated by high attendance rates, with 93% of young adults and 90% of parents attending all group sessions, and no family dropouts. Both young adults and parents reported high satisfaction with session logistics, though some logistical conflicts and a preference for in-person sessions were noted. Acceptability ratings were strong, with most satisfaction scores exceeding 7 out of 10, and both groups reporting significant gains in confidence and skills related to transitioning to adulthood. Cultural fit was confirmed, with 94% of participants finding the program relevant and aligned with military and family values. Preliminary outcomes indicated improvements in self-confidence, independence, social connections, and family relationships. Participants emphasized the program's effects in addressing the unique needs of the military community. Conclusions: The findings highlight the importance of culturally tailored interventions in fostering successful transitions for underserved populations, specifically military-dependent young adults with ASD.