Senior Engineer - Infrastructure

Key Responsibilities

·    Provide advanced Level 3 production support for business-critical OneMain 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 OneMain 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 OneMain 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 PowerShell and other approved automation methods.

·    Support deployments, configuration changes, patching, maintenance activities, and production readiness for OneMain 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.

Targeted Platform Engineering Responsibilities

·    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 OneMain Auto workloads.

Required Qualifications

·    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 PowerShell 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.

Preferred Qualifications

·    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.

Core Competencies

·    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.

Business Focus

This position supports OneMain Auto within OMFS Tech Ops & Eng Mgmt. The primary objective is to maintain reliable production operations while modernizing the application-hosting components and operational practices that support OneMain Auto systems.