|  | This biographical article is written like a résumé .(May 2021) | 
|   O'Brien in 2013 | |
| Personal information | |
|---|---|
| Full name | Mark O'Brien | 
| Born | 16 September 1987 Horsham, Australia | 
| Team information | |
| Discipline | Road | 
| Role | Rider | 
| Amateur team | |
| 2020–2022 | InForm TM Insight MAKE | 
| Professional teams | |
| 2007–2009 | Drapac–Porsche Development Program | 
| 2010 | LeTua Cycling Team | 
| 2011 | SP Tableware | 
| 2012 | Team Budget Forklifts | 
| 2013 | Team Raleigh | 
| 2014–2016 | Avanti Racing Team | 
| 2018 | Drapac–EF p/b Cannondale Holistic Development Team | 
Mark O'Brien (born 16 September 1987 in Horsham) is an Australian cyclist, who last rode for Australian amateur team InForm TM Insight MAKE. [1] He won the 2024 Melbourne to Warrnambool Cycling Classic. [2]