Our top client in the travel/transportation industry is searching for a Lead Systems Engineer with IBM i (iSeries/AS400) expertise to join their team! You will administer and optimize IBM i (iSeries/AS400) environments, manage system performance, security, upgrades, backups, disaster recovery, and high-availability solutions to ensure reliable business operations. You will also design, implement, and support enterprise infrastructure across Windows, Linux, VMware, Hyper-V, Azure, and hybrid cloud environments, including servers, storage, Active Directory, DNS, and DHCP services. Current experience with IBM i (iSeries/AS400) and a Bachelor's Degree is required for this position. We are only able to consider candidates currently living in the Greater St. Louis, MO area for this position. 100% remote 1+ year contract with benefits available on contract Cannot work C2C or 3rd party referral Required Must be presently authorized to work in the U.S. without a requirement for work authorization sponsorship by our company for this position now or in the future Must reside in St. Louis, Missouri, or immediate surrounding area Bachelor's degree in Computer Science, Information Technology, Engineering, or a related field, or equivalent combination of education and experience. 5+ years of experience in systems engineering, infrastructure administration, or related IT roles. 3+ years of hands-on experience administering and supporting IBM i (iSeries/AS400) environments. Experience managing enterprise server environments, including Windows Server and Linux operating systems. Experience with infrastructure technologies such as virtualization, storage systems, backup/recovery solutions, and networking. Knowledge of enterprise security principles, patch management, vulnerability remediation, and access management. Experience troubleshooting complex infrastructure issues and performing root cause analysis. Experience supporting high-availability, disaster recovery, and business continuity solutions. Strong understanding of system monitoring, performance tuning, capacity planning, and operational support. Ability to create and maintain technical documentation, system procedures, and support standards. Strong problem-solving, analytical, communication, and collaboration skills. Ability to provide after-hours support as needed. Must be committed to incorporating security into all decisions and daily job responsibilities Preferred : Experience administering IBM i environments, including security, BRMS, Power Systems, LPARs, performance management, PowerVM, and VIOS. Experience supporting cloud and hybrid infrastructure environments (Azure, AWS, and/or GCP). Experience with virtualization platforms such as VMware, Hyper-V, or Nutanix. Experience with enterprise storage, backup, and disaster recovery technologies. Experience with automation and scripting using PowerShell, Python, Ansible, Bash, or similar tools. Working knowledge of networking, identity and access management, and infrastructure security principles. Experience operating within ITIL-based service management and change management processes. Experience supporting highly available, business-critical production environments. Relevant technical certifications in IBM i, cloud platforms, virtualization, infrastructure, or IT service management