Seeking a highly experienced IBM Z Systems Engineer to support the modernization of the Defense Information Systems Agency's mainframe environments through a mainframe hybrid cloud prototype. This role will perform the implementation of z/OS, Linux on Z, and container-based systems within a modernized on-premises infrastructure that integrates with centralized control planes, automation platforms, and multi-cloud resources. The engineer will ensure operational continuity, performance parity, and security compliance during system setup, software integration, and workload migration.

• Install and tune the z/OS operating system on cloud-hosted or on-premises IBM Z hardware.
• Configure logical partitions (LPARs), I/O subsystems, and network connectivity.
• Define mainframe hardware profiles and allocate resources (CPU, memory, channels).
• Validate system performance benchmarks and readiness for production workloads.

• Deploy and configure core software for z/OS, z/Linux, and containerized platforms.
• Integrate essential components: monitoring, security, ESM tools, and automation pipelines (e.g., Ansible, STIG enforcement).
• Ensure software configurations meet functionality, performance, and security compliance requirements as defined by the government.

• Migrate and optimize existing mainframe system software, middleware (e.g., transaction managers, databases), and supporting services to the new hybrid environment.
• Replicate key performance configurations from legacy systems to achieve parity or improvement.

• Configure and integrate the centralized control plane to support:
• User authentication and RBAC
• Resource provisioning
• Monitoring and alerting
• Utility-based billing dashboards
• Ensure project performance goals through robust testing and validation.
• Align implementation with DISA’s Statement of Need (SoN) and assist in accreditation processes.

• Conduct system validation, tuning, and benchmarking during initial deployment.
• Monitor system behavior under application load and adjust parameters for throughput and reliability.
• Leverage automation to detect and resolve performance anomalies.

• Support the automated provisioning and deployment of multiple z/OS and z/Linux instances
• Create and execute workload migration plans, including:
• Application-specific configuration mapping
• Pre-migration testing and post-migration assessments
• Support disaster recovery planning and backup integration.

• • Provide engineering input to support system design validation, control plane extensibility, and emerging capability integration.
  • Recommend infrastructure modifications and ensure implemented systems adhere to DoD hybrid cloud architecture standards.

• 8+ years of experience in mainframe systems engineering with expertise in:
• z/OS installation, JES2/JES3, VTAM/TCP-IP
• LPAR and IOCP/HCD configuration
• Storage and network management (e.g., DFSMS, OSA adapters)
• Proven track record of system software migration, sysplex configuration, and performance tuning.
• Familiarity with Infrastructure and Configuration as Code, STIG compliance, and hybrid/cloud-integrated control planes.
• Understanding of DevSecOps pipelines and application modernization in z/OS or z/Linux.
• Active DoD Secret clearance required.

• IBM certifications in System Z, z/OS Administration, or related domains.
• Scripting proficiency in CLIST or REXX, JCL automation, or experience with z/OSMF.
• Experience with enterprise tools: ServiceNow, Splunk, Tivoli, etc.
• Familiarity with multi-tenant architectures, cloud-integrated IBM Z partitions, and automation frameworks.

Diné Development Corporation (DDC) is a Navajo Nation owned family of companies that delivers IT, professional, and environmental solutions to advance the missions of federal, state, and tribal government agencies. As thought leaders and innovators, our team of specialists build client-centric solutions that solve critical challenges faced by defense, civilian, and healthcare organizations. Employing a mission-focused approach, we deliver value that not only enhances current operations, but also drives future change. Closely aligned with this approach is our commitment to advancing the Navajo Nation and its People. Through economic development and community empowerment, we elevate the Navajo Nation to provide lasting impact and sustainable growth for future generations. DDC’s ability to unite legacy-inspired technologies, industry best practices, and proven methodologies has contributed to our success for twenty years.

This contractor and subcontractor shall abide by the requirements of 41 CFR 60-1.4(a), 60-300.5(a) and 60-741.5(a). These regulations prohibit discrimination against qualified individuals based on their status as protected veterans or individuals with disabilities, and prohibit discrimination against all individuals based on their race, color, religion, sex, sexual orientation, gender identity, national origin, or for inquiring about, discussing, or disclosing information about compensation, or any other basis prohibited by law. We participate in E-Verify.