[1] Bishagara researched in the Programme de la Lutte Contre le SIDA et les Infections Sexuellement Transmissibles and Permanent Executive Secretariat of the National AIDS Commission, which together form Burundi's national HIV/AIDS center (1995–1996).
She was a technical advisor in Save the Children UK in 2006, and also in PSI – Features for VIH prevention (2005–2006).
From 2008 to 2011, Bishagara was the national program manager of Jhpiego/MCHIP International, an NGO affiliated with Johns Hopkins University (USAID).
[1] She held board member positions at White Ribbon Alliance for Safe Motherhood (2007–2011), Université Libre de Kigali (2008–2011) and Rwanda Local Development Support Funds (2007–2011).
[3] She died on 8 July 2019[1] at Johns Hopkins Hospital, Baltimore, Maryland, U.S.[4] She was buried at Rusororo Cemetery in Kigali.