APAC Data Center Site Engineer

Job Description
Role Summary:
At Citadel Securities, technology powers everything we do. From real-time market connectivity to ultra-low latency trading and risk systems, our infrastructure must be fast, reliable, and secure-at all times.
As an APAC Data Centre Site Engineer, you'll be at the forefront of that mission. This is not just a data centre role-it's a chance to design, deploy, and optimize infrastructure in high-performance environments where every millisecond matters. You'll work directly with elite engineers, technologists, and traders to solve complex challenges that move global markets.
Opportunities may be available from time to time in any location in which the business is based for suitable candidates. If you are interested in a career with Citadel, please share your details and we will contact you if there is a vacancy available.
Responsibilities:

• Deploy and maintain cutting-edge hardware across APAC exchange colocation and general-purpose data centres
• Lead onsite delivery for large-scale infrastructure rollouts, including racks, cabling, power, servers, and networking
• Ensure seamless integration of servers, network switches, and storage systems into Citadel's global trading stack
• Troubleshoot and optimize infrastructure performance using advanced testing and diagnostic tools
• Collaborate with global engineering teams to deliver scalable, reliable, and low-latency environments
• Travel across the APAC region to support business-critical deployments and initiatives

Qualifications:
Technical Skills

• 5+ years of hands-on experience in colocations and data centres, ideally in financial or high-performance environments
• Deep understanding of hardware lifecycle management and maintenance across:
• Servers: HP, Cisco, Dell, Supermicro, Lenovo
• Network: Cisco, Arista, Raritan
• Appliances: FSMLabs, Novasparks, Microchip, Safran
• Storage: EMC/Dell, Isilon, NetApp, Pure
• Smart electrical systems and PDUs
• Strong colocation infrastructure knowledge: space planning, rack layouts, power/cooling design
• Expertise in installing and cabling equipment (fiber/copper), including termination, testing, and certification
• Familiarity with infrastructure diagnostic tools: OTDR, light meters, cable testers
• Understanding of cross-connect deployment in colocation and exchange environments
• Proficiency in Windows 11/10, MS Office; basic Linux knowledge a plus
• Experience with baseboard management tools: ILO, iDRAC, or equivalent

Operational & Business Execution

• Proven track record managing distributed data centre operations across multiple countries and time zones
• Strong ability to plan and execute large-scale rollouts while maintaining strategic oversight
• Experience bridging knowledge across server, network, and storage domains
• Skilled in managing vendor relationships and evaluating colocation contracts
• Organized and self-directed, with the ability to balance competing demands and ensure uptime
• Familiarity with data centre safety standards and operational best practices
• Excellent verbal and written communication in English; fluency in Mandarin, Cantonese, or Hindi is a strong plus
• Willingness to travel frequently across the APAC region

Why Join Us

• Hands-On + Leadership: Lead critical projects while staying close to the tech
• Global Impact: Your infrastructure will directly support real-time trading across global markets
• Cutting-Edge Tools: Work with the latest hardware and systems in low-latency environments
• Elite Team: Collaborate with world-class engineers and technologists in Hong Kong, Singapore, Chicago, London, and beyond
• Career Acceleration: Grow within a world-class infrastructure organization that values innovation and results
• Culture of Excellence: Thrive in a meritocratic environment where the best ideas win

About Citadel Securities
Citadel Securities is a technology-driven, next-generation global market maker. We provide institutional and retail investors with world-class liquidity, competitive pricing and seamless front-to-back execution in a broad array of financial products. Our teams of engineers, traders and researchers harness leading-edge quantitative research and the accelerating power of compute, machine learning and AI to power our analytics and tackle the market's and our clients' most critical challenges. Together, we are forging the future of capital markets. For more information, visit citadelsecurities.com .