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Position Summary

At Marathon, we are trailblazers in the Oil & Gas industry, driving innovation and creating value through cutting edge digital platforms and infrastructure. Our Midstream IT organization supports Marathon’s Midstream Business Units, including Gathering, Transporting, Storing, Processing, and Distributing Oil & Gas products. We take pride in our ability to deliver high-quality services and transformative solutions that enhance operational performance.

As we continue to transform the Midstream technological landscape, we are seeking a dynamic and experienced Senior Platforms Engineer to join our OT Windows team. This role combines deep technical expertise with strategic vision to deliver secure, scalable, and automated platform solutions across critical OT environments.

A successful candidate will lead the design, implementation, and lifecycle management of mission-critical OT platforms across Windows and Linux environments. This includes partnering with IT, cybersecurity, and operations teams to deliver secure, scalable, and automated infrastructure solutions. This role demands a strategic mindset and deep technical expertise in enterprise systems, identity security, and cloud integration, ensuring platforms are resilient, compliant, and aligned with industry best practices.

This position belongs to a family of jobs with increasing responsibility, competency, and skill level. Actual position title and pay grade will be based on the selected candidate’s experience and qualifications

Key Responsibilities

• Identifies performance bottlenecks, conducts root cause analysis, and proposes and implements solutions to enhance platform & system performance and resource utilization. Establishes performance benchmarks, conducts capacity planning, and collaborates with other teams, including junior engineers and cross functional teams to optimize infrastructure performance and activities.
• Contributes to the development and improvement of troubleshooting procedures, measures to minimize platform & system downtime, and documentation. Partners with vendor technical support to drive for resolution. Leads and manages platform & system technical support activities and troubleshooting efforts, including handling escalated and complex issues. Performs advanced system tuning and optimization to maximize performance using IT Service Management practices. Collaborates with internal teams to enhance support processes and methodologies.
• Participates in future platform & system backup planning. Leads the design of disaster/system recovery and testing.
• Analyzes performance and utilization data to identify trends and patterns; provides recommendations for optimization and improvement; prepares comprehensive reports on infrastructure performance; and implements corrective actions to drive continuous system improvements
• Leads the design and configuration of complex platforms & systems, considering best practices and industry standards. Leads ongoing compliance with original design and configuration and corrects for deviation from standards. Builds and deploys highly available and scalable infrastructure solutions.
• Leads the creation and maintenance of a comprehensive knowledge base for platforms & systems, including troubleshooting guides, configuration documentation, and best practices. Promotes knowledge sharing culture by organizing training sessions, mentoring junior engineers, and encouraging cross-team collaboration.
• Design, implement, and maintain enterprise-grade systems across Windows Server and Linux platforms, ensuring high availability and security in OT environments.
• Lead design and deployment of Active Directory and Linux directory services, including advanced configurations for forests, trusts, replication, and identity integration.
• Develop and enforce Identity and Access Management (IAM) strategies, including Identity Governance and Administration (IGA) and Privileged Access Management (PAM) solutions.
• Drive automation of system provisioning, configuration, and patching using advanced scripting (PowerShell, Bash, Python) and orchestration tools.
• Oversee software deployment and configuration management through SCCM, Intune, and Linux-native tools.
• Integrate and secure cloud platforms (Azure, AWS, or similar) for hybrid OT environments, ensuring compliance with organizational and regulatory standards.
• Collaborate with cybersecurity teams to implement zero-trust principles and enforce least-privilege access across all systems.
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