Greer is an award-winning writer and producer from Northern Ireland. He co-founded London based production company Paradox House and had films playing at Cannes, Berlin, Toronto and Sundance Film Festival.

Greer's writing credits include feature film 'Butterfly Kisses' winner of the Crystal Bear at the 2017 Berlinale. Most recently he co-wrote horror film, 'What Remains of Us' for Universal Studios, and 'How to Date Billy Walsh', for Amazon Studios. He is also a writer for the Northern Irish crime drama 'Hope Street'.

Represented by Berlin Associates, his scripts have been selected for BBC Drama Room, BBC Writers Room, Microwave, Midpoint, LA Screenwriters Festival, Northern Ireland Screen Development Funding, Cinestory, IFP, and the Sam Spiegel Film Lab.