RecruitingBehavioural interventionSymptom-Targeted Approach to Rehabilitation for Concussion (STAR-C)Purpose: Investigators propose a three-arm RCT across two military treatment facilities:1) in-person STAR-C, 2) telehealth STAR-C, and 3) no treatment control. Outcomes will be assessed immediately and at one- and three-months post treatment. Hypothesis/Objectives: STAR-C, delivered in-person and via telehealth, will be effective in decreasing everyday cognitive complaints among patients with a history of mTBI. Effectiveness will be moderated by patient characteristics. Stakeholder feedback will yield a process map for broad implementation of STAR-C in varied clinical environments.