John Khoo: Email & Phone Number

Opt-Out

Quantitative Developer at Citadel Securities|Singapore

Position:

Quantitative Developer at Citadel Securities

Location:

Singapore

View John Khoo's Email

Up to 10 free lookups. No credit card required.

Last updated: 2026-08-06

Updated: 2026-08-06

Found email addresses for John Khoo:

Business emails:

k******n@citadelsecurities.com

Personal emails:

j********f@gmail.com

Found phone for John Khoo:

+65-***-***-8653

A different John Khoo?

Work Experience 10 years

Quantitative Developer at Citadel Securities

Jan 2026 - Current

Member of Technical Staff II (Communications Security) at DSO National Laboratories

Jul 2024 - Dec 2025

Member of Technical Staff I (Communications Security) at DSO National Laboratories

Sep 2022 - Jul 2024

Research Intern at DSO National Laboratories

May 2021 - Jul 2021

Electronics Engineering Intern at Squareroot8 Technologies

Jan 2020 - Jan 2021

Research Intern at DSO National Laboratories

May 2020 - Jul 2020

Teaching Assistant at National University of Singapore

Jan 2020 - May 2020

Software Engineer at SG Investors Corporate Services

Nov 2018 - Jan 2019

Platoon Sergeant at Singapore Army

Dec 2016 - Feb 2018

Their professional focus is Analytical Skills, ARM Architecture, and C across 3 core areas.

John holds Respond to Fire and Hazmat Emergencies and Cisco Certified Network Associate Routing and Switching (CCNA) certifications and has been awarded DSO Merit Scholarship

Education

Bachelor of Engineering at National University of Singapore

Frequently Asked Questions

What is John Khoo's email address?

SignalHire found verified email addresses for John Khoo, both business and personal. Their business email is k******n@citadelsecurities.com, and personal emails include j********f@gmail.com.

What is John Khoo's phone number?

SignalHire found a verified phone number for John Khoo: +65-***-***-8653.

How do I contact John Khoo at Citadel Securities?

You can reach John Khoo through SignalHire by unlocking their verified email and direct phone number (free signup, no credit card needed). SignalHire is the fastest route if you need their contact details immediately.

What is John Khoo's professional background?

John Khoo has 10 years of professional experience. They have held roles including Member of Technical Staff II (Communications Security), Member of Technical Staff I (Communications Security), and Research Intern at companies such as DSO National Laboratories, DSO National Laboratories, and DSO National Laboratories. Their education includes Bachelor of Engineering from National University of Singapore.

Is John Khoo's contact information up to date?

Yes. John Khoo's SignalHire profile was last updated on 6 August 2026, reflecting their current position as Quantitative Developer at Citadel Securities in Miami, Florida, United States.

John Khoo Namesakes

Name

Company

Position

John Khoo

PT. Blue Ocean Labs

Factory Manager

Get contacts

See more profiles

Similar profiles

Name

Company

Position

Arik Katson

Self-employed

Quantitative Developer

Get contacts

Itay Refaely

Millennium

Quantitative Developer

Get contacts

Sahaj Tiwari

Mudraksh & McShaw Tech LLP

Quantitative Developer

Get contacts

Bhupendra Singh Patawat

SFinTech

Quantitative Developer

Get contacts

Alejandro Arakelian

Kalshi

Quantitative Developer

Get contacts

Darryl Stein

NAB

Quantitative Developer

Get contacts

See more profiles

Other employees at Citadel Securities

Name

Company

Position

Zach Sekaran

Citadel Securities

Equity Options Trader

Get contacts

Dennis Chen

Citadel Securities

Quantitative Trader

Get contacts

Rohan Dugad

Citadel Securities

Software Engineer Intern

Get contacts

Josh Kaplan

Citadel Securities

Trader

Get contacts

Vivian Chai

Citadel Securities

Senior Data Analyst

Get contacts

Darsh Chaudhari

Citadel Securities

Trader

Get contacts

Alberto Mosconi

Citadel Securities

Quantitative Trader

Get contacts

Gary Macnamara

Citadel Securities

Software Engineer

Get contacts

William Kong

Citadel Securities

Team Lead

Get contacts

Yash Saxena

Citadel Securities

Quantitative Trading Intern

Get contacts

See more profiles

Data Privacy

GDPR COMPLIANT

SignalHire complies with the General Data Protection Regulation (GDPR). SignalHire follows GDPR requirements, including but not limited to rights of data subjects to access, correct, or delete their personal information and supports the right to be forgotten.

CCPA COMPLIANT

SignalHire is CCPA-compliant and provides California residents the right to know, access, opt out, and request deletion of their personal data.