INSC has four officers: Chairman, 1st Vice-Chairman, 2nd Vice-Chairman and Secretary/Treasurer. In addition, to give the necessary material support to the organization, the Chairman appoints an assistant from his Society to perform his secretarial activities.
The officers are elected by majority vote of the members of the Council. The term of office is two years, starting on January 1st of the year following the election.
The following tables list the INSC officers since its creation:
| Post | 1991 – 1992 | 1993 – 1994 | 1995 – 1996 |
| Chairman | Jean van Dievoet (ENS) | L.Manning Muntzing (ANS) | Mishima Yoshitsugu (AESJ) |
| 1st Vice-Chairman | L.Manning Muntzing (ANS) | Mishima Yoshitsugu (AESJ) | Manuel Acero (ENS) |
| 2nd Vice-Chairman | * | Manuel Acero (ENS) | Robert Long (ANS) |
| Secretary/treasurer | Jorge Spitalnik (LAS) | Jorge Spitalnik (LAS) | Jorge Spitalnik (LAS) |
| Chairman’s secretariat | Peter Feuz (ENS) | James Toscas (ANS) | Endo Yuzo (AESJ) |
| Post | 1997 – 1998 | 1999 – 2000 | 2001 – 2002 |
| Chairman | Manuel Acero (ENS) | Gail de Planque (ANS) | Chang Kun Lee (KNS) |
| 1st Vice-Chairman | Gail de Planque (ANS) ** | Chang Kun Lee (KNS) | Jorge Spitalnik (LAS) |
| 2nd Vice-Chairman | Chang Kun Lee (KNS) | Jorge Spitalnik (LAS) | Agneta Rising (ENS) |
| Secretary/treasurer | Jorge Spitalnik (LAS) | Konrad Hädener (ENS) | Andy Kadak (ANS) |
| Chairman’s secretariat | Montserrat Casero (ENS) | Mike Diekman (ANS) | B-K Kim (KNS) *** |
| Post | 2003 – 2004 | 2005 – 2006 | 2007 – 2008 |
| Chairman | Jorge Spitalnik (LAS) | Bertrand Barre (ENS) | Andy Kadak (ANS) |
| 1st Vice-Chairman | Bertrand Barre (ENS) | Andy Kadak (ANS) | Gustavo Alonso (SNM) |
| 2nd Vice-Chairman | Andy Kadak (ANS) | Shunsuke Kondo (AESJ) | Shunsuke Kondo (AESJ) |
| Secretary/treasurer | Shunsuke Kondo (AESJ) | Jose L. Delgado (SNM) ***** | Frank Deconinck (ENS) |
| Chairman’s secretariat | Satomi Nishimura (AESJ) | Satomi Nishimura (AESJ) **** | Mike Diekman (ANS) |
| Post | 2009 – 2010 | 2011 – 2012 | 2013 – 2014 |
| Chairman | Gustavo Alonso (SNM) | Bernard Jolly (ENS) | Hisashi Ninokata (AESJ) |
| 1st Vice-Chairman | Bernard Jolly (ENS) | Hisashi Ninokata (AESJ) | William Burchill (ANS) |
| 2nd Vice-Chairman | Shunsuke Kondo (AESJ) | William Burchill (ANS) | Jaime Pahissa-Campa (LAS) |
| Secretary/treasurer | William Burchill (ANS) | Jaime Pahissa-Campa (LAS) | Jean-Pol Poncelet (ENS) |
| Chairman’s secretariat | Mike Diekman (ANS) | Mike Diekman (ANS) | Konatsu Orihara (AESJ) |
| Post | 2015 – 2016 | 2017 – 2018 | 2019 – 2020 |
| Chairman | William Burchill (ANS) | Jaime Pahissa-Campa (LAS-ANS) | Fernando Naredo (ENS) |
| 1st Vice-Chairman | Jaime Pahissa-Campa (LAS) | Fernando Naredo (ENS) | Poong Hyun Seong (KNS) |
| 2nd Vice-Chairman | to be determined (ENS) | Poong Hyun Seong (KNS) | Peter Ozemoyah (CNS) |
| Secretary/treasurer | Kune Y. Suh (KNS) | Peter Ozemoyah (CNS) | Orpet Peixoto (LAS-ANS) |
| Chairman’s secretariat |
| Post | 2021 | 2022* | 2023 |
| Chairman | Poong Hyun Seong (KNS) | Poong Hyun Seong (KNS) | Peter Ozemoyah (CNS) |
| 1st Vice-Chairman | Peter Ozemoyah (CNS) | Peter Ozemoyah (CNS) | Orpet Peixoto (LAS-ANS) |
| 2nd Vice-Chairman | Orpet Peixoto (LAS-ANS) | Orpet Peixoto (LAS-ANS) | Marc Deffrennes (ENS) |
| Secretary | Marc Deffrennes (ENS) | Marc Deffrennes (ENS) | Khadija Bendam (WIN Global) |
| Treasurer | Marc Deffrennes (ENS) | Martina Etzmuss (WIN-Global) 1 Jan. – 22 July, 2022 Eileen Langegger (WIN-Global) 23 July – 31 Dec., 2022 | Eileen Langegger (WIN – Global) |
| Immediate Past Chair | Fernando Naredo (ENS) | Fernando Naredo (ENS) | Poong Hyun Seong (KNS) |
| Chairman’s secretariat | Jeong Ik Lee (KNS) | Jeong Ik Lee (KNS) |
*From January 1, 2022, Officers are Chair, 1st Vice-Chair, 2nd Vice-Chair, Secretary, Treasurer and Immediate Past Chair serving each position for one year.
| Post | 2024 | ||
| Chairmen | Orpet Peixoto (LAS-ANS) | ||
| 1st Vice Chairmen | Marc Deffrennes (ENS) | ||
| 2nd Vice Chairmen | Khadija Bendam (WIN Global) | ||
| Secretary | Tsai-Yueh Luo (NEST) | ||
| Treasurer | Eileen Langegger (WIN-Global) | ||
| Immediate Past Chair | Peter Ozemoyah | ||
| Chairman’s secretariat |
*The 2nd Vice-Chairman post was established in 1993
**[1997] Robert Long (ANS)
***[2002] John K. Chung (KNS)
****[2006] Mike Diekman (ANS)
*****[2006] Gustavo Alonso(SNM)