Senior Network Systems Engineer Train Control and SCADA Operations

Randstad is seeking a highly experienced Senior Network Systems Engineer to support and maintain mission-critical Train Control and SCADA systems for a major transportation client in Philadelphia, PA. This role involves administering and upgrading network infrastructure, RedHat and Windows-based systems, and ensuring 24/7 availability and cybersecurity of real-time train control operations. The ideal candidate has deep experience with SCADA environments, network architecture, and infrastructure security, and thrives in a high-stakes, collaborative setting with both technical teams and operational leadership.

• Lead technical efforts to maintain and enhance Train Control and SCADA system infrastructure.
• Ensure 24/7 availability of four critical Train Control System facilities and their supporting network infrastructure.
• Administer and configure RedHat and Windows-based systems for high availability and security.
• Manage, maintain, and troubleshoot routers, switches, and firewalls in support of a fault-tolerant communications network.
• Plan and execute software and hardware upgrades for servers, workstations, and network equipment.
• Develop, implement, and monitor network security policies and practices.
• Interface with internal and external technical specialists to resolve system issues and plan enhancements.
• Create and maintain system documentation, network diagrams, and troubleshooting procedures.
• Support emergency technical response and rotating on-call responsibilities.
• Assist with developing procedures and documentation to improve operational readiness and response.

• Minimum 7 years of experience supporting SCADA or real-time control systems
• Minimum 7 years of experience with RedHat and Windows systems administration
• Experience configuring and maintaining routers, switches, and firewalls
• Strong understanding of network security practices and protocols
• Proven experience in full lifecycle management of hardware/software projects
• Expertise in RedHat Enterprise Linux and Windows Server platforms
• Bachelor's degree in Computer Science, Engineering, or related field (or equivalent experience)
• Industry certifications such as CompTIA Network+, Security+, or equivalent
• Cisco certifications such as CCNA or CCNP (preferred)
• Experience with high-availability, fault-tolerant network design
• Strong technical documentation and troubleshooting skills
• Experience working in 24/7 operational environments with on-call responsibilities
• Familiarity with railroad operations, signaling, or transportation systems (preferred)
• Master's degree in Computer Science or related field (preferred)

• Strong problem-solving and analysis skills
• Excellent oral and written communication
• Ability to work independently and in teams
• Proven leadership in technical environments
• Deep understanding of secure systems design
• High attention to detail and documentation
• Strong time management and prioritization
• Effective cross-functional collaboration skills
• Adaptability in high-pressure situations
• Technical troubleshooting and root cause analysis
• Capacity for mentoring and knowledge sharing
• Commitment to operational excellence and uptime
• Experience gathering and defining requirements
• Ability to manage multiple concurrent projects
• Strong interpersonal and stakeholder skills

Equal Opportunity Employer: Race, Color, Religion, Sex, Sexual Orientation, Gender Identity, National Origin, Age, Genetic Information, Disability, Protected Veteran Status, or any other legally protected group status.

At Randstad Digital, we welcome people of all abilities and want to ensure that our hiring and interview process meets the needs of all applicants. If you require a reasonable accommodation to make your application or interview experience a great one, please contact

Pay offered to a successful candidate will be based on several factors including the candidate's education, work experience, work location, specific job duties, certifications, etc. In addition, Randstad Digital offers a comprehensive benefits package, including: medical, prescription, dental, vision, AD&D, and life insurance offerings, short-term disability, and a 401K plan (all benefits are based on eligibility).

This posting is open for thirty (30) days.