Shiellah has served as the WFDF Ultimate Events Subcommittee Chair since 2017 and as the EUF Head Scorekeeper since 2019. She has worked for BULA as Volunteer Coordinator at WCBU/EBUCC/EBUC since 2015 and as a WFDF Game Advisor/Trainer starting from WUCC 2014. She has been a USAU Certified Observer Trainer since 2012 and the USAU Northeast Regional Observer Coordinator since 2011. She is also a USAU Certified Observer since 2007, USAU/UPA Club Championships Volunteer Coordinator (2003–2012), and UPA Northeast Mixed Regional Coordinator (2003–2008). She was the Executive Director of the Canadian Ultimate Players Association (2004–2006) and the Executive Director of the Association de Ultimate de Montréal (2002–2008).