Senior Engineer - Infrastructure

• Provide advanced Level 3 production support for business-critical One Main Auto applications and supporting technology components.
• Troubleshoot complex application-hosting and system issues across Windows Server, IIS, SQL Server, Azure IaaS, authentication, connectivity, and dependent services.
• Build, configure, maintain, and improve the operating components used by One Main Auto applications within approved enterprise standards.
• Serve as the Level 4 technical escalation point for external partners, vendors, and third-party service providers; coordinate complex technical investigations through resolution.
• Perform root cause analysis and implement corrective and preventive actions that improve long-term reliability and reduce recurring production issues.
• Partner with One Main incident response teams as the technical subject matter expert for the supported systems without owning incident command or coordination.
• Improve observability through monitoring, logging, alerting, health checks, and operational telemetry.
• Identify and reduce operational toil through Power Shell and other approved automation methods.
• Support deployments, configuration changes, patching, maintenance activities, and production readiness for One Main Auto systems.
• Maintain strong working knowledge of network dependencies and cloud networking concepts and coordinate with dedicated network teams when changes or troubleshooting are required.
• Collaborate across application development, network, database, security, IAM, platform, cloud, and enterprise operations teams.
• Participate in an on-call rotation supporting production systems.

• Develop reusable configurations, scripts, deployment patterns, and operational tooling that improve consistency and reliability.
• Contribute to standardization efforts that reduce configuration drift across environments.
• Support Infrastructure as Code practices where appropriate for repeatable provisioning and configuration.
• Contribute to modernization initiatives, including migration of suitable workloads toward containerized or managed runtime platforms.
• Partner with platform engineering teams to improve the operability, resilience, and lifecycle management of One Main Auto workloads.

• 5+ years of experience in production operations, site reliability engineering, systems/application support, or a closely related technical role.
• Strong hands-on experience supporting Windows Server in production environments.
• Strong working knowledge of IIS administration, configuration, troubleshooting, and application hosting.
• Working knowledge of Microsoft SQL Server from a production support and application operations perspective.
• Strong Power Shell scripting and automation skills.
• Experience supporting Microsoft Azure environments with an emphasis on IaaS workloads.
• Strong understanding of network fundamentals, DNS, routing, firewalls, load balancing, TLS/certificates, and cloud connectivity sufficient to troubleshoot cross-system dependencies.
• Demonstrated ability to perform advanced troubleshooting and root cause analysis across complex, multi-tier systems.
• Experience working with external vendors or technology partners on high-severity technical escalations.
• Ability to coordinate work across multiple enterprise technology teams in a cloud-first environment.

• Experience with Infrastructure as Code tools such as Terraform, Bicep, ARM templates, or equivalent.
• Experience with containerization technologies such as Docker, Kubernetes, or Azure Kubernetes Service (AKS).
• Exposure to SRE practices such as service level indicators (SLIs), service level objectives (SLOs), error budgets, and toil reduction.
• Experience with CI/CD pipelines and production deployment automation.
• Experience supporting financial services or other regulated production environments.
• Relevant Microsoft Azure certifications.

• Production ownership and reliability mindset.
• Advanced systems-level troubleshooting and analytical thinking.
• Strong technical communication with internal teams, vendors, and external partners.
• Automation-first approach to repetitive operational work.
• Ability to operate effectively in high-availability, business-critical environments.
• Strong cross-team coordination and accountability.

This position supports One Main Auto within OMFS Tech Ops & Eng Mgmt. The primary objective is to maintain reliable production operations while modernizing the…