Top Senior Systems Engineer Jobs in Chicago, IL

Designs, deploys, manages, and optimizes Microsoft Azure infrastructure and PaaS services. Responsibilities include Infrastructure as Code with Terraform and Bicep, Azure DevOps automation, security and governance, monitoring, troubleshooting, production support, disaster recovery, and resiliency planning. Partners with technical teams on cloud modernization, provides senior-level guidance, and mentors cloud and Microsoft 365 staff.

Provides Oracle-based digital finance and systems integration consulting for clients. Responsibilities include analyzing financial processes, designing and implementing business application solutions, integrating enterprise platforms, supporting NetSuite adoption, managing projects and budgets, applying agile methodologies, documenting deliverables, and maintaining stakeholder relationships. The role also provides client training, technical support, and optimization advice across financial planning, reporting, and operations.

Lead and contribute to the design, integration, deployment, and sustainment of mission-focused systems. Translate stakeholder needs into technical requirements, architectures, interface definitions, deployment patterns, and operational processes. Partner with software engineers and data scientists to integrate applications, data pipelines, infrastructure, and external systems. Support testing, verification, troubleshooting, operational readiness, documentation, and reliability improvements for secure, scalable, data-intensive systems.

Lead daily operations, monitoring, performance tuning, security, backups, disaster recovery, and high availability for mission-critical IBM i environments. Partner with application and database teams on deployments and troubleshooting, execute upgrades and migrations, plan capacity, maintain technical documentation, and mentor systems engineers.

Design, build, and maintain core gameplay systems, frameworks, Unreal Engine plugins, and multiplayer networking systems. Own technical architecture, performance, scalability, debugging, and technical debt reduction. Partner with designers and programmers, mentor engineers, lead code reviews and design discussions, document systems, and support sprint planning for an Unreal Engine game project.

Designs, implements, secures, and supports enterprise IT systems across a multi-site manufacturing environment. Owns Tier 3 incident resolution, hybrid and multi-cloud infrastructure, identity, endpoints, servers, networking, virtualization, and enterprise migrations. Leads modernization initiatives, supports regulated government cloud environments, develops automation and documentation, and mentors IT teams. The role requires strong expertise in Azure, AWS, Microsoft 365, Active Directory, Windows environments, hybrid architectures, and security-focused infrastructure operations.

Designs, leads, and supports enterprise network security and infrastructure solutions. Responsibilities include network engineering, NAC, IAM, ZTNA, VPN, certificate and PKI management, secure connectivity, identity-driven access controls, segmentation, highly available distributed environments, platform upgrades, lifecycle management, and capacity planning. The role also evaluates technology solutions and leads cross-functional initiatives focused on performance, reliability, scalability, and capacity.

Lead end-to-end LLM inference performance across serving systems, models, GPU hardware, and workloads. Define rigorous benchmarks, diagnose bottlenecks from scheduling through kernels and interconnects, optimize single- and multi-node deployments, and deliver production-ready runtimes and configurations. Collaborate with product and infrastructure teams, evaluate inference technologies, and implement runtime fixes. The role requires strong Python engineering, production experience with serving engines such as vLLM or SGLang, GPU profiling, and knowledge of modern inference optimization techniques.

Maintains AWS infrastructure supporting PLM applications for DoD customers. Responsibilities include cloud architecture, Ansible automation, database administration, application installation and patching, security updates, performance tuning, testing, troubleshooting, documentation, and infrastructure scaling. Requires AWS and Security+ certifications, enterprise cloud experience, Linux and Windows administration, database expertise, an active or obtainable U.S. national security clearance, and potential travel to customer sites.

Designs, automates, secures, and operates Microsoft Azure and Microsoft 365 cloud and hybrid infrastructure. Responsibilities include identity, endpoint, virtual desktop, monitoring, backup, resiliency, automation, security hardening, incident response, documentation, and technical leadership. The role leads infrastructure modernization workstreams, coordinates with vendors and stakeholders, supports on-call operations, and evaluates AI and Copilot applications for secure operational automation.

Lead design and implementation of data architecture and scalable storage solutions, drive AI/GenAI thought leadership, oversee data governance and security, translate business requirements into technical plans, implement FastAPI endpoints, enhance LLMs through prompt engineering, and manage cross-functional teams to deliver advanced data and AI solutions.

Develop and optimize AI and machine learning algorithms, models, and scalable Python systems. Transform raw data into actionable insights, apply machine learning libraries and NLP techniques, improve data quality, and deliver automation solutions for clients. The role also involves complex data analysis, stakeholder collaboration, client relationship management, and navigating ambiguous business challenges.

Own and deliver IT projects including client onboarding, network overhauls, cloud migrations, and security implementations. Serve as the final escalation point for complex Microsoft, networking, virtualization, and remote-access issues in an MSP environment. Lead project planning, client communication, documentation, process improvement, and post-project reviews while mentoring Tier 1 and Tier 2 engineers and setting technical standards.

Lead complex presales engagements for Boomi’s API Management solutions across North America. Design API-first strategies, governance models, security policies, developer portals, and enterprise architectures. Advise executive stakeholders on digital ecosystems and business value, lead proofs of concept and RFI/RFP responses, and demonstrate integration between API Management and iPaaS capabilities. The role requires deep expertise in API lifecycle management, gateways, identity and security frameworks, cloud platforms, microservices, service mesh, and event-driven architectures.

Lead design, implementation, and maintenance of system architectures across applications, infrastructure, and cloud platforms for federal IT modernization. Provide technical leadership, ensure performance, reliability, and integration, produce documentation, and collaborate with DevOps, security, and stakeholders within Agile teams.

Architect, deploy, and operate highly available multi-cloud infrastructure across AWS and Azure. Manage Kubernetes, Linux systems, databases, caching platforms, CI/CD pipelines, infrastructure as code, observability, security, incident response, and performance optimization. The role also requires automation with Python and Bash, comprehensive documentation, client collaboration, and participation in a 24/7 on-call rotation.

Provides advanced remote IT support, systems administration, infrastructure troubleshooting, and technical escalation across client environments. Administers Microsoft 365, Windows Server, identity systems, Azure, networking, virtualization, endpoint management, and cybersecurity technologies. Mentors junior engineers, resolves complex tickets, maintains documentation and change controls, supports infrastructure initiatives, and evaluates emerging technologies. The role requires remote availability during West Coast Pacific Time business hours and effective communication in a managed services environment.

Designs, implements, administers, and supports IBM i environments on IBM Power systems. Responsibilities include partition management, OS upgrades, PTFs, backups and restores, high availability replication, networking, security, capacity planning, hardware maintenance, and tier-three customer support. The engineer also provides technical guidance, documentation, training, vendor coordination, and 24/7 on-call support.

The Senior Systems Engineer I will develop and enhance mobile applications for cardiac health solutions, collaborating with engineers and cross-functional teams to ensure compliance with standards and successful project delivery.

Build fault-tolerant, self-healing infrastructure and internal tooling for a brokerage platform. Expand observability using Prometheus, Honeycomb, OpenTelemetry, and Grafana; scale HashiCorp Nomad services through capacity planning and load testing; establish SLOs, error budgets, and alerting; analyze Linux and networking performance; support production on-call operations; and mentor engineers in site reliability practices.

Leads end-to-end engineering execution across the program lifecycle, coordinating multidisciplinary teams and partner organizations to meet cost, schedule, and technical objectives. Drives metrics-based decisions, risk mitigation, engineering process rigor, staffing and execution planning, and milestone reviews including SRR, PDR, CDR, and TRR. The role requires defense engineering experience, systems integration expertise, EVM knowledge, and an active Secret clearance.

Leads enterprise systems engineering across on-premises, cloud, and hybrid environments. Designs and operates servers, virtualization, storage, identity services, Azure, Microsoft 365, backup, disaster recovery, monitoring, and security controls. Automates infrastructure, manages patching and access governance, leads modernization and infrastructure projects, coordinates vendors, supports incident response, and mentors technical staff. Oversees an offshore Systems Engineering team and serves as a senior escalation point for complex infrastructure and IAM issues.

Senior systems engineer responsible for enterprise network and endpoint infrastructure in a complex healthcare environment. The role focuses on MECM/SCCM architecture, software distribution, operating system deployment, patching, virtualization, server administration, backup and recovery, disaster recovery, troubleshooting, capacity monitoring, technical recommendations, vendor escalation, and mentoring. The position is remote with on-call responsibilities and requires travel.

Designs, builds, maintains, and improves Windows, virtualization, cloud, data center, identity, and access infrastructure. Responsibilities include automation, infrastructure as code, security hardening, patch remediation, monitoring, performance tuning, technical documentation, mentoring junior staff, and on-call support.

Leads system safety engineering for safety-critical aerospace electronic systems across the product lifecycle. Performs FHA, PSSA, SSA, FTA, FMEA/FMECA, CCA, PRA, and ZSA; develops safety requirements, evaluates architectures, supports certification, maintains traceability and safety artifacts, advises stakeholders, and mentors engineers. Collaborates with multidisciplinary engineering, quality, program, customer, supplier, and certification teams to ensure compliance and robust product assurance.