Senior Security Analyst Jobs in Appleton, WI (NOW HIRING)

Summary of Responsibilities:

Build the Future of Cloud, Automation, and Hybrid Infrastructure
At ATC, we power the systems that keep the electric grid running. As a Technology System Engineer, you will help design, automate, and evolve secure, reliable, and scalable infrastructure platforms with a strong emphasis on cloud services, infrastructure as code, and operational automation.
This is a unique opportunity to work across modern hybrid environments that span Azure and on-prem systems, helping ensure cloud-forward designs remain practical, resilient, and aligned to mission-critical operational needs.
This role requires on-call rotation and you must live in or be willing to relocate to Wisconsin within two hours of an ATC control center, which are located in Pewaukee and Cottage Grove. This role is not available for remote work.

Essential Responsibilities:

What You'll Do

• Lead and support infrastructure platforms across Azure and on-prem environments
• Design secure, resilient, and scalable solutions that balance cloud adoption with hybrid operational requirements
• Build and maintain automation for provisioning, configuration, deployment, and operational support using infrastructure as code and scripting
• Engineer and support cloud services, virtual infrastructure, containers, and core platform services
• Troubleshoot platform issues and lead root cause analysis with an emphasis on reliability, observability, and continuous improvement
• Plan and support upgrades, patching, and lifecycle activities across hybrid environments in collaboration with operations, security, and application teams
• Standardize platform patterns and reduce manual effort through automation, orchestration, and repeatable engineering practices
• Develop and maintain technical documentation, recovery procedures, and implementation standards for cloud and hybrid platforms
• Partner with security teams to identify and mitigate risk across cloud and on-prem services
• Support disaster recovery planning, testing, and response for business-critical infrastructure services

What You Bring

• Bachelor's degree in Computer Science, MIS, or related field (or equivalent experience)
• 3+ years supporting enterprise infrastructure, cloud platforms, or hybrid environments
• Experience with Azure cloud services and core platform capabilities across IaaS, PaaS, and identity services
• Experience with automation and scripting such as PowerShell, Python, Ansible, Terraform, or similar tools
• Experience with infrastructure as code, configuration management, and repeatable deployment practices
• Experience with Kubernetes, containers, or modern application platform technologies
• Familiarity with virtualization technologies such as VMware or Nutanix and their role in hybrid platform design
• Knowledge of Windows Server and/or Red Hat Enterprise Linux administration
• Experience with identity platforms such as Active Directory, LDAP, or Entra ID
• Understanding of networking fundamentals including DNS, DHCP, routing, switching, and connectivity across hybrid environments
• Strong communication, collaboration, and problem-solving skills

Preferred Qualifications

• Experience with infrastructure automation, DevOps pipelines, monitoring, or cloud operations tooling
• Familiarity with VDI, load balancing, identity platforms, or other technologies that support hybrid end-user and infrastructure services
• Experience in regulated, compliance-driven, or mission-critical environments
• Relevant certifications such as Azure, RHCE, Kubernetes, Terraform, or virtualization credentials

Why ATC

At ATC, our mission is to operate, maintain, and protect the electric grid. Our technology teams play a vital role in delivering secure, resilient, and modern platform services that enable reliable energy delivery. You'll be part of a collaborative team advancing cloud adoption, automation, and engineering standardization while supporting the hybrid environments required for mission-critical operations.

The targeted base pay for this position is $119,500 to $139,400 annually.* Base pay is one component of our comprehensive total rewards package which includes an annual incentive bonus, employer-sponsored pension plan, 401(k) match, HSA contribution, life & disability insurance, health care benefits, generous time off plans, flexible work arrangements, and much more.

*The pay range is a general guideline. Employment offers are evaluated individually and consider qualifications, experience, academic achievements, internal equity, and business needs. Pay exceeding the posted range is considered for uniquely qualified candidates. Interested internal candidates, with questions, please consult your Human Resources Business Partner.

Number of Openings Available:

1

Posting Date:

2026-06-01

Time Type:

Full time

Equal Opportunity Employer:

Applicants have rights under employment laws.

ATC is an equal opportunity employer that seeks to foster diverse teams of talented people working safely together. We respect and embrace diversity of all aspects and hire, train and promote employees without regard to race, color, religion, sex, age, national origin, sexual orientation, disability, genetics, protected veteran status, or any other characteristic protected by law. We encourage women, minorities, veterans and individuals with a disability to apply. All qualified applicants will receive consideration for employment without regard to anycharacteristic protected by law.

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