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Core Systems System Administrator

Singapore, Singapore · Job Posted March 24, 2026
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Job Description

The Security Systems Application Specialist 3 (Sys Admin 3) is a key member of the global technology team responsible for building and maintaining enterprise technology application systems.

Job Responsibility

  • Maintaining production systems, software, hardware, and end devices
  • Installation, configuration, maintenance, and support of physical and cloud-based Windows and Linux servers
  • Ensuring the security, integrity, and availability of systems
  • Monitoring operational systems for errors and alerts
  • Troubleshooting, adding, configuring, and removing various technologies related to access control, intrusion detection, emergency, video, and other security systems
  • Document daily functions and troubleshooting process to create and revise playbooks

Requirements

  • Bachelor's Degree and 5+ Years of progressive experience
  • Associates Degree and 8+ Years of progressive experience
  • HS Diploma or Equivalent and 10+ Years of progressive experience
  • System administrator experience in performing triage on system problems, resolving the system problems, analyzing system data to prevent problems, implementing new workstations, and system extensions
  • 2 + years of experience programming/administrating Physical Access Control Systems
  • Demonstrated previous experience effectively managing small teams
  • Demonstrated understanding of Windows patching and vulnerability remediation
  • Demonstrated advanced knowledge of Windows active directory hierarchy and implementation
  • Basic knowledge of large-scale networking, VLANS and routing
  • Requires reliable attendance at customer site during work hours required by customer
  • Requires the ability to work flexible shifts that include nights, weekends and holidays as needed
  • Requires minimum of Security + Certification, CASP, or CISSP certification
  • Demonstrated background working with multidisciplinary teams
  • Demonstrated time management and organization skills to meet deadlines and quality objectives
  • Proficient in MS Excel, Word, Visio, and PowerPoint

What we offer

  • A collaborative team inspired by the way engineering and innovation enhance customer outcomes, improve lives, and change the world for the better
  • An opportunity to lead and build a business with the support of an industry-leading firm that has been in business for 75 years
  • Investment in your skills and expertise through a combination of professional and technical training programs, including leadership training and tuition reimbursement
  • Open and transparent communication with senior leadership as well as local office management

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