| P. N. Sivaji | |
| Fullname: | Poravankara Narayanan Nair Sivaji |
| Birth Place: | Singapore |
| Manageryears1: | 1992–1993 |
| Managerclubs1: | Singapore |
| Manageryears2: | 1996 |
| Managerclubs2: | Tanjong Pagar United |
| Manageryears3: | 1998–2001 |
| Managerclubs3: | Balestier Khalsa |
| Manageryears4: | 2003 |
| Managerclubs4: | Young Lions |
| Manageryears5: | 2004–2007 |
| Managerclubs5: | Singapore (technical director) |
| Manageryears6: | 2008–2009 |
| Managerclubs6: | Lion City Sailors |
| Manageryears7: | 2010–2011 |
| Managerclubs7: | Hanthawaddy United |
| Manageryears8: | 2012–2013 |
| Managerclubs8: | Shan United |
| Manageryears9: | 2020–2021 |
| Managerclubs9: | Brunei (technical director) |
Poravankara Narayanan Nair Sivaji is a Singaporean former footballer and manager.
In 1992, Sivaji was appointed manager of Singapore.[1] In 1996, he was appointed manager of Singaporean side Tanjong Pagar United.[2] In 2004, he was appointed manager technical director of Singapore.[1] In 2008, Sivaji was appointed manager of Lion City Sailors in Singapore.[2]
In 2010, he was appointed manager of Burmese club Hanthawaddy United, helping them win the 2010 General Aung San Shield, their only major trophy.[3] In 2020, he was appointed technical director of Brunei.[4]