This prospective trial evaluates the 12-week, multi-domain Memory Boot Camp program for adults ages 55 to 85 with symptoms of mild cognitive impairment. The Memory Boot Camp program incorporates neurofeedback, heart rate variability biofeedback, memory and cognitive training, and one-on-one coaching to encourage behavior change in diet, sleep, physical fitness, and stress reduction. Participants are evaluated via neurocognitive assessments, questionnaires, quantitative electroencephalography parameters, and heart rate variability parameters at four time points: baseline, pre-program, post-program, and follow-up. The trial included a 12-week waiting period between baseline and pre-program, such that each participant acts as their own control, and follow-up takes place six months after completion of the program.