Background: Parents experience high distress following their child's diagnosis of cancer. We previously tested two delivery models (group and one-on-one) of the "Promoting Resilience in Stress Management for Parents"(PRISM-P) intervention in a randomized trial: one-on-one delivery improved resilience and benefit finding at three months when compared to usual care (UC). Objective: The objective of this analysis was to evaluate quantitative and qualitative outcomes at six months. Design: In this single-center, phase 2, parallel, 1:1:1 randomized trial conducted December 2016 to December 2018, English-speaking parents with a 2-24 year-old child diagnosed with new cancer were randomly assigned to UC, one-on-one, or group PRISM-P, a brief, skill-based curriculum targeting stress management, goal setting, cognitive reframing, and meaning making. We collected parent-reported outcomes (resilience, benefit finding, and psychological distress) at baseline and three and six months. We applied linear mixed-effects regression models to examine six-month outcomes among all participants and conducted directed content analyses of exit interviews with the first 12 parents to complete each study arm. Results: The 94 participating parents were median aged 35-38 years and predominantly white, college-educated mothers. At six months, there was no statistically significant difference in parent-reported outcomes. Exit interviews (n = 36) suggested that PRISM-P was highly valued: 100% of interviewed recipients recommended it for other parents. Most suggested more coaching would help them retain skills, and almost all endorsed a combined one-on-one and group program. Conclusions: Although the PRISM-P benefits observed at three months were not sustained for six months, all interviewed parents found it valuable. Additional opportunities to strengthen and sustain resilience resources include longer follow-up, flexible format, and skill reinforcement. Trial Registration: NCT02998086.