The Senior Mainframe Engineer plays a critical role within our managed services engineering team, providing technical leadership and driving operational excellence across customer environments. This position focuses on developing standards, optimizing processes, and ensuring consistent, reliable delivery of mainframe services. The ideal candidate will combine deep technical expertise with strategic vision to modernize z/OS environments and lead initiatives that enhance efficiency and scalability. About This Role: Key Responsibilities • Serve as a technical leader, guiding best practices and mentoring team members on z/OS operating system upgrade optimization • Design and implement standardized approaches for z/OS upgrades and mass maintenance to ensure repeatable, high-quality outcomes • Lead efforts to optimize system performance, streamline processes, and reduce operational complexity • Oversee installation, configuration, and maintenance of IBM and ISV software products, ensuring alignment with enterprise standards • Collaborate with cross-functional teams to plan and execute operating system upgrades with minimal business impact • Develop and maintain comprehensive technical documentation and templates for operating system rollouts • Drive adoption of new technologies and capabilities (e.g., Sysplex enhancements, automation frameworks) to support strategic objectives • Act as the subject matter expert (SME) for mainframe infrastructure projects, providing technical direction and governance • Provide advanced troubleshooting and resolution for escalated incidents beyond Level 1 support • Participate in after-hours and weekend support as required Required Expertise • Proven experience in z/OS operating system upgrades, mass maintenance deployment, and software installation • In-depth knowledge of z/OS components: JES2, HCD/IODF, SMP/E, WLM, OMVS/USS, SMF/RMF, ASM, GRS, SDSF, TSO and RACF • Strong understanding of communication protocols (VTAM, TCP/IP) and LPAR configuration via HMC • Expertise in storage management (SMS, HSM, DFDSS, VSAM, IDCAMS, ICF Catalogs) • Minimum 10 years of experience as a Mainframe Senior Systems Engineer Preferred Skills • Familiarity with mainframe automation and monitoring tools • Experience with major subsystems (CICS TS, IMS, DB2 and IBM MQ) • Knowledge of tape library configuration, printer setup, and TCP/IP server configuration • Understanding of IBM Z hardware architecture The Ideal Candidate for This Role: Leadership & Core Competencies • Demonstrated ability to lead technical teams, influence decisions, and set strategic direction • Skilled in developing repeatable, standardized processes for complex system upgrades and migrations • Strong problem-solving mindset with a focus on efficiency and continuous improvement • Excellent communication skills—able to articulate technical concepts clearly to diverse audiences Work Environment: It is anticipated that the incumbent in this role will work remotely, offering you the freedom to contribute to our mission from wherever you work best, without compromising on career growth or connection to our team. Regardless of your location, you'll be fully integrated into our team through robust digital collaboration tools and regular communication. The incumbent can work remotely from any of the states listed on the job posting, though occasional travel may be required for in-person meetings. Please note, work location is subject to change based on business needs. Candidates must possess unrestricted work authorization and not require future sponsorship. Work Environment: It is anticipated that the incumbent in this role will work remotely, offering you the freedom to contribute to our mission from wherever you work best, without compromising on career growth or connection to our team. Regardless of your location, you'll be fully integrated into our team through robust digital collaboration tools and regular communication. The incumbent can work remotely from any of the states listed on the job posting, though occasional travel may be required for in-person meetings. Please note, work location is subject to change based on business needs. Compensation and Benefits Overview: We offer a variety of benefits designed to keep you and your family physically and financially healthy. Not only do we offer a competitive salary and work-life balance, we offer benefits to match your needs: • Medical, Dental, Vision Insurance • 401k, With Matching Contributions • Time Off Programs • Health Savings Account (HSA)/Dependent Care • Employee Banking • Growth Opportunities • Tuition Assistance • Short-Term/Long-Term Disability Insurance Learn more about FNBO benefits here: https://www.fnbo.com/careers/benefits/. To obtain compensation and benefit information related to this specific role, e-mail FNBO at [email protected]. To ensure you receive a response, include the number of this job (listed below) in the subject line of your message. Job number: R-20261565