Eirini-Maria is an international election professional, having participated as election and legal expert as well as Team Leader in 37 election-related missions of all types, namely election observation, election expert, exploratory, assessment, follow-up and electoral assistance missions.

Over the last 15 years she has been deployed in Africa (Sudan, Nigeria, Democratic Republic of Congo, Guinea-Conakry, Libya, Tunisia, Central African Republic, Zimbabwe, Malawi, Mali, Ethiopia), Asia (Pakistan, Afghanistan, Bangladesh, Turkmenistan), Oceania (Papua New Guinea, New Caledonia), Caribbean (Haiti), North America (U.S.A.) and Europe (Moldova, Serbia, Armenia, Poland, Iceland, Malta, Russian Federation), working with the European Union, the OSCE/ODIHR, the UNDP, the European Centre for Electoral Support (ECES), the International Foundation for Electoral Systems (IFES) and The Carter Center.

Furthermore, she also conducted trainings and capacity building seminars for legal and election analysts of EU EOMs as well as for members of Election Management Bodies in Sudan and Ethiopia on electoral issues. Possessing a University Degree in law and a post-graduate degree in European Union Law, she worked for eight years as criminal defense lawyer in Greece, being called at the Bar Association of Thessaloniki in 2001, while also coordinated eight election processes in Greece as head of polling centres.

In addition to the election-related work, Eirini-Maria also cooperated with civil society organisations and think tanks on issues related to disability discrimination, gender-based violence and judicial reform.