Freelance Mainframe Security Engineer Jobs in Iowa

Remote Mainframe Developer (zOS) - Intermediate Systems Engineer
Location: Remote (CST Support) | C2C | Cedar Rapids, IA, 52404
About the Role
Join Aegon's global IT team as an Intermediate Systems Engineer supporting our enterprise zOS Mainframe environments. In this fully remote position, you'll play a pivotal role in maintaining, enhancing, and securing critical mainframe infrastructure, with primary coverage during US Central business hours (08:00-16:30 CST) and rotating on-call support. Collaborate with international teams to deliver best-in-class, innovative IT services that drive Aegon's digital transformation and operational excellence.
Responsibilities
- Provide daily operational support for mainframe components and software, ensuring optimal system health and availability
- Install, test, document, and maintain zOS mainframe systems within a sysplex environment
- Manage and troubleshoot BMC Control-D output management systems including mission, decollation, report definitions, and web access
- Proactively monitor key system metrics, identify improvement opportunities, and prevent potential issues through regular software and vendor updates
- Resolve moderate system issues to root cause, working with vendors for advanced troubleshooting and diagnostics
- Support disaster recovery testing and contribute to business continuity planning
- Participate in internal and business-unit-driven projects, including third-party software installations and platform adaptations
- Deliver responsive customer support, fulfilling service requests and supporting on-call rotations (including weekends as needed)
- Continuously improve processes and systems to enhance service reliability and efficiency
Required Skills and Experience
- 4-7 years' experience in a mainframe support role
- Moderate knowledge of z architecture mainframe systems, JCL, TSO/ISPF, SDSF, and BMC Control-D
- Proficiency in at least one mainframe programming language: Assembler, COBOL, REXX, or SAS
- Solid understanding of IT infrastructure, disaster recovery concepts, and documented testing/implementation procedures
- Strong verbal and written communication skills with attention to detail and analytical thinking
- Demonstrated ability to work collaboratively in a diverse, highly distributed team environment
- Commitment to information security and compliance with policy standards
Preferred Skills
- Experience with enterprise-scale sysplex environments and global infrastructure support
- Familiarity with proactive system health monitoring and vendor management
Benefits
- 100% remote work with flexible scheduling and on-call rotation
- Exposure to a global technology environment and modern mainframe practices
- Opportunities for professional growth and advancement within Aegon's international IT organization
- Collaborative, innovative, and inclusive work culture
How to Apply
If you have the technical expertise and collaborative spirit to support Aegon's mainframe platform, apply today by submitting your updated resume. Qualified candidates must be authorized to work in the United States without sponsorship. Background check and drug screening required.
(JSON format)