Guppi worked for Oxfam GB for 5 years, and did a short stint at Oxfam International in 2012. Her work focussed on aid, health, education and tax inequality. Her final project was with My Rights My Voice and involved a residential training for international youth activists from Afghanistan, Pakistan, Niger, Mali, Vietnam, Tanzania, Georgia and Nepal. At Oxfam International she led an evaluation of Oxfam’s aid campaigns between 2010-2012.