After injury, survivors of msTBI depend on informal family caregivers. Upwards of 77% of family caregivers experience poor outcomes, such as adverse life changes, poor health related quality of life, and increased depressive symptoms. Caregivers frequently report minimal support or training to prepare them for their new role. Periods of care transitions, such as ICU discharge, are most difficult. The majority (93%) of previously developed caregiver and caregiver/survivor dyad interventions after msTBI focus on providing information or practical skills to either survivors, or to long-term caregivers (>6 months post injury), rather than education, support, and skill-building that the new caregiver may use proactively that will benefit the dyad acutely after injury. The Aims of this proposal are to: (1) Determine feasibility, satisfaction, and data trends of CG-Well; and (2) Understand how baseline psychosocial risk factors affect response to CG-Well compared to an Information, Support, and Referral control group. To accomplish this, I will first enroll 6-10 caregivers and tailor CG-well until each finds the intervention acceptable, appropriate, and feasible. I will then enroll 100 (50/group) dyads and determine satisfaction ratings, recruitment, retention, and treatment fidelity of CG-Well. Additionally, I will determine if caregivers report reductions in depressive symptoms and improvements in life changes as a result of improvements in task difficulty and threat appraisal in CG-Well compared to ISR at six months. Information obtained in Aims 1 and 2 will be used to plan a larger Phase III trial of CG-Well. Completing these Aims and the training plan will improve outcomes of caregivers and downstream outcomes of survivors of msTBI, and provide me with the skillset necessary to become an independent researcher who can develop and test high-impact, high-fidelity, sustainable interventions.