People who are diagnosed with an intellectual/ developmental disability as well as a mental illness possess a higher risk for engagement in maladaptive behaviors and/or psychosocial distress. Often, impairments in expressive and receptive language skills can lead to a myriad of complications. In order to meet the needs of this population, accurate assessment and systematic behavioral management techniques should be implemented across environments. Evidence-based practices have been proven as effective interventions for people experiencing a combination of maladaptive behaviors and psychiatric symptoms. In this short session, we will take time to discuss proactive interventions that can be implemented across environments. Principles of reinforcement, engagement in activities, validation and therapeutic strategies will be discussed. In addition, the impact of COVID-19 on this population will be conferred as we move towards opening up programs from a year of seclusion.