| Roles | Referee |
|---|---|
| Sex | Male |
| Full name | Jack•Marjanovic |
| Used name | Jack•Marjanovic |
| NOC |  Australia |
| Games | Sport (Discipline) / Event | NOC / Team | Phase | Unit | Role | As | |
|---|---|---|---|---|---|---|---|
| 1984 Summer Olympics | Hockey | AUS |
Jack Marjanovic | ||||
| Hockey, Men (Olympic) | Match 5/6 | India — Netherlands | Umpire 1 | ||||
| Hockey, Men (Olympic) | Match #3 | Great Britain — Kenya | Umpire 1 | ||||
| Hockey, Men (Olympic) | Match #4 | Netherlands — New Zealand | Umpire 2 | ||||
| Hockey, Men (Olympic) | Match #7 | Kenya — Canada | Umpire 2 |
