Sean Wat Jianwen PPA(P) is a Singaporean two-star rear-admiral who has been serving as Chief of Navy since 2023.

[3][2][4] Wat was awarded the Singapore Armed Forces Overseas Scholarship to study at Stanford University, where he graduated with a Bachelor of Arts and Science degree in mathematics and philosophy and a Master of Science degree in management science and engineering.

[3] He served as Commanding Officer of the Formidable-class frigate RSS Supreme and later Deputy Commander of the Maritime Security Task Force.

[2] He also served as Director of the Defence Policy Office under the Ministry of Defence (MINDEF).

[2] Prior to his appointment as Chief of Navy, Wat was Fleet Commander between 2022 and 2023.