Caregivers play a critical role in mediating the impacts of forced displacement on children; however, humanitarian programming remains hampered by a lack of evidence-based programming. We present findings from an evaluation of a group-based curriculum delivered over the course of 12 sessions, journey of life (JoL). A waitlist-control quasi-experimental design was implemented in the Kiryandongo refugee settlement (intervention n = 631, control n = 676). Caregiver mental distress, measured using the Kessler-6, was the primary outcome. Secondary outcomes included (a) functioning, (b) social support and (c) caregiving attitudes and behaviors. Propensity score matching (PSM) and Cohen’s d estimates were used to examine the intervention effects. According to our primary PSM analysis, JoL led to significant improvements in mental distress (coef.: 2.33; p < 0.001), social support (coef.: 1.45; p < 0.001), functioning (coef.: 2.64; p < 0.001), parental warmth/affection (coef.: 2.48; p < 0.001), parental undifferentiated rejection (coef.: 0.49; p < 0.001) and attitudes around violence against children (VAC) (coef.: 1.98; p < 0.001). Evidence from Cohen’s d analysis underscored the value of the intervention’s effect on parental warmth/affection (0.74), mental distress (0.70) and VAC attitudes (0.68). This trial adds to the evidence on holistic parenting programming to improve the mental health and parenting outcomes among refugee caregivers.