YB Khairunnisa actively promotes youth development and environmental sustainability in Brunei and in the region. She is currently a member of the Brunei Legislative Council; General Manager for RECOVER; Co-Founder/Community Engagement Director for Green Brunei; and Green Xchange Director for the Society for Community Outreach and Training.

Her work primarily focuses on youth development through environmental advocacy, where she organises camps, school talks, recycling drives, river and beach cleanups and tree planting. She also founded the nation's first Green Depot, which enables communities to save through recycling as a means to promote better waste management efforts while providing money-saving habits.

She is the recipient of the ZICO ASEAN 40 Under 40 (2018); Excellent Service Medal (PIKB) (2016); The Queen's Young Leaders Award (2015); ASEAN Youth Day Award (2014); and Youth Service Award (2013). The Green Xchange programme has also received the ‘Outstanding Project for Youth Association Award' from His Majesty the Sultan of Brunei Darussalam in conjunction with the National Youth Day in 2016.