Senior Mainframe Administrator (z / OS and Networking) - Remote

For further inquiries regarding the following opportunity, please contact our Talent Specialist.

Abdul at (224) 507-1295

Vinod at (224) 507-1294

Job Title : Senior Mainframe Administrator (z / OS and Networking) - Remote

Location : Remote (Initial one month onsite in Springfield, IL, followed by remote work with occasional onsite visits as needed)

Duration : 6 months

All onsite travel expenses will be reimbursed - the first month by DivIHN, and thereafter by the client.

Job Summary :

The Client is seeking an experienced Senior z / OS Systems Administrator with extensive expertise in mainframe system administration. This individual will serve as a senior resource to assist Client with general system administration for a IBM z16 mainframe and DR environment with experience in maintaining and assisting with mainframe network administration, security certificates, SFTP, APIs, TCPIP

The role is critical to ensuring the resilience, availability, security, and compliance of the Client's enterprise mainframe infrastructure. The successful candidate will work with IBM, HPE, and internal IT teams to design, implement, monitor, primary and secondary mainframe systems that support the Client's mission-critical applications.

Responsibilities :

• Provide advanced system administration and technical leadership for IBM z / OS mainframe systems.
• Manage and maintain network configurations, connectivity, and communication protocols (SNA, TCP / IP, VTAM, NJE, etc.) in the mainframe environment.
• Troubleshoot and resolve complex system, network, and application-level issues, driving root cause analysis and long-term corrective actions.
• Assist with planning and application of system maintenance, software upgrades, and PTFs, coordinating with system programmers and vendor support.
• Administer and enforce mainframe security policies (RACF, ACF2, or Top Secret), including user access management and compliance controls.
• Participate in and provide guidance for problem, change, and incident management processes, ensuring timely resolution and documentation.
• Collaborate with infrastructure, application, and network teams to ensure seamless integration and high availability across systems.
• Mentor junior administrators and contribute to process improvement and automation initiatives.

Required Skills & Experience :

Preferred Qualifications

Education

About us :

DivIHN , the 'IT Asset Performance Services' organization, provides Professional Consulting, Custom Projects, and Professional Resource Augmentation services to clients in the Mid-West and beyond. The strategic characteristics of the organization are Standardization, Specialization, and Collaboration.

DivIHN is an equal opportunity employer. DivIHN does not and shall not discriminate against any employee or qualified applicant on the basis of race, color, religion (creed), gender, gender expression, age, national origin (ancestry), disability, marital status, sexual orientation, or military status.