Joyce has a Masters degree in Political Science and International Relations. She has worked in local government, the European Parliament and a European academic network as policy advisor.
Since 2011 Joyce has been working as an international advocacy officer for COC Netherlands. This work involves working in coalition with LGBT activists from different regions and human rights organisations towards the UN, the EU, OSCE and the CoE to make human rights standards also apply to LGBT people. She has been a lesbian activist for over 10 years and has been involved in re-establishing the LGBT group within the Dutch Social Democratic Party (PvdA) and setting up the Rainbow Rose network, a European coalition of LGBT groups within social democratic and labour parties.