UISCE (Advocacy For People Who Use Drugs) Staff

Mark Costello

Mark Costello Coordinator UISCE


Mark Costello – Coordinator

Mark began his work in the community and voluntary sector in 2002, volunteering as a community representative in Blanchardstown Local Drug and Alcohol Task Force. After graduating Mark launched his career in the community and voluntary sector.  He continues to promote and advocate for the human rights, civil liberties for the community of people who use drugs, who are marginalised in our society and has worked in many different settings to include: coordinating and leadership, education, training and employment, community prison links, project/outreach work and addiction counselling.

María Otero Vázquez

Maria Otero Vazquez Community Development Officer UISCE

Community Development Officer

María Otero Vázquez – Community Development Officer

María started as an intern in UISCE back in 2016 and since 2017 she works as Community Development Officer of UISCE managing projects, advocacy and communications, working in partnership with services and coproducing and editing the Brass Munkie magazine. She holds a MSc. in Health Psychology from the University of Santiago de Compostela (Spain) and a MRes. Applied Research in Feminist, Gender and Citizenship Studies from the University Jaume I (Spain).

Lynn Jefferys

Maria Otero Vazquez Community Development Officer UISCE

Peer Support Worker

Lynn Jefferys – Peer Support Worker

Lynn began their work in harm reduction services in 2009 volunteering at a 24-hour drop-in centre for sex workers in Vancouver, Canada. They have since had experience in youth work, housing first, mental health & addiction, human resources administration, low threshold program management and outreach. Most recently they worked as a relief project worker for Depaul in 2016, and now working as the Peer Support Worker for UISCE, they are a firm believer in community-based organizing and self-determination for people who access services.

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