Senior Linux Systems Administrator - Datacenter Infrastructure

The Role:

ION Markets is seeking an accomplished and driven Senior Linux Systems Administrator to join our Datacenter Systems Administrative Team. Based in our Somerset, NJ datacenter, this role offers a compelling opportunity to contribute to mission-critical infrastructure across North and South America.
Our team oversees a robust estate of over 2,500 Red Hat Enterprise Linux (RHEL) systems deployed on HPE ProLiant hardware, supporting high-performance environments in multiple datacenters. We are embarking on transformative infrastructure initiatives that demand deep technical expertise, strategic thinking, and a passion for operational excellence.

Key Responsibilities::
• Lead advanced administration, configuration, and performance optimization of Red Hat Enterprise Linux (RHEL) systems.
• Architect and manage RHEL KVM virtualization environments, including provisioning, troubleshooting boot issues, and fine-tuning for optimal performance.
• Oversee lifecycle management of HPE ProLiant hardware, including upgrade analysis, firmware upgrades, component replacements, and remote diagnostics via iLO.
• Design and execute robust processes for infrastructure patching, reboot orchestration, and content lifecycle management.
• Administer and enhance security posture through deployment and maintenance of EDR and SIEM agents, ensuring compliance with CVE remediation SLAs.
• Analyze and resolve kernel-level system bottlenecks and network latency, delivering actionable performance tuning strategies.
• Manage HPE storage platforms (Primera, Alletra), including SAN zoning, volume provisioning, LVM configuration, and fiber channel switch operations.
• Maintain critical datacenter services: NTP/Chrony, Elastic Stack, Puppet, Cobbler, Rundeck, Squid Proxy, DNS, and Postfix.
• Implement proactive monitoring using tools such as Nagios/Naemon, Prometheus, and PRTG, ensuring high availability and rapid incident response.
• Develop and maintain automation frameworks using Ansible, Python, Perl, and shell scripting to streamline operational workflows.
• Respond to service requests and incident tickets with precision, adhering to rigorous change management and production protocols.
• Provide detailed procedural documentation and remote guidance for external datacenter teams across geographically distributed locations.

Required Skills, Experience and Qualifications::
• Minimum 10 years of hands-on experience in enterprise-level Linux system administration and technical operations; prior experience in financial services is highly advantageous.
• Proven expertise in RHEL 7/8, including deep familiarity with KVM virtualization and system internals.
• Advanced knowledge of HPE ProLiant server architecture, diagnostics, and lifecycle management.
• Demonstrated proficiency in security operations, including EDR/SIEM agent management and vulnerability remediation.
• Experience with HPE SAN technologies, including fabric zoning, Primera/Alletra storage systems, and fiber channel networking.
• Working knowledge of Puppet and Cobbler for configuration and provisioning automation.
• Proficient in scripting languages: Python, Perl, and Bash; capable of developing scalable automation solutions.
• Solid understanding of networking fundamentals, including VLANs, trunking, routing, multicast, and NAT.
• Red Hat Certified System Administrator (RHCSA) or Red Hat Certified Engineer (RHCE) certification preferred.
• Exceptional communication and collaboration skills across cross-functional teams and remote support personnel.
• Strategic problem-solving acumen with a focus on reliability, scalability, and performance in high-availability environments.
• Ability to lead and mentor junior engineers, fostering a culture of continuous improvement and technical excellence.

About us

We’re a diverse group of visionary innovators who provide trading and workflow automation software, high-value analytics, and strategic consulting to corporations, central banks, financial institutions, and governments. Founded in 1999, we’ve achieved tremendous growth by bringing together some of the best and most successful financial technology companies in the world.

• Over 2,000 of the world’s leading corporations, including 50% of the Fortune 500 and 30% of the world’s central banks, trust ION solutions to manage their cash, in-house banking, commodity supply chain, trading and risk.
• Over 800 of the world’s leading banks and broker-dealers use our electronic trading platforms to operate the world’s financial market infrastructure.

ION is a rapidly expanding and dynamic group with 13,000 employees and offices in more than 40 cities around the globe. Our ever-expanding global footprint, cutting edge products, and over 40,000 customers worldwide provide an unparalleled career experience for those who share our vision.

ION is committed to maintaining a supportive and inclusive environment for people with diverse backgrounds and experiences. We respect the varied identities, abilities, cultures, and traditions of the individuals who comprise our organization and recognize the value that different backgrounds and points of view bring to our business.
ION adheres to an equal employment opportunity policy that prohibits discriminatory practices or harassment against applicants or employees based on any legally impermissible factor.