The COVID-19 pandemic has significantly impacted the mental well-being of health care workers (HCWs). This study assessed the feasibility, acceptability, and preliminary efficacy of two psychological interventions, gratitude journaling or cognitive strategies, on pediatric HCWs. A pilot randomized parallel repeated measures design was used, with a convenience sample of 59 HCWs. Data were collected before and after the intervention period, 2 weeks after, and again 6 months later. Outcomes included depression, anxiety, meaning and purpose, feasibility, and acceptability. Thirty-seven participants completed the study. The majority were nurses (registered nurses and advanced practice registered nurses) and physicians. In both groups, depression and anxiety scores diminished, but changes were not statistically significant. The study was feasible to conduct, and subjects reported high acceptability. Gratitude journaling and cognitive strategies may help mental well-being in HCWs; however, future studies with larger samples are needed.