Senior L3 Windows AWS Infrastructure Engineer

About the role

As a Senior L3 Windows AWS Infrastructure Engineer, you will make an impact by leading the administration, optimization, and modernization of enterprise Windows Server, Active Directory, and AWS Cloud environments. You will serve as a senior technical expert responsible for ensuring the reliability, security, performance, and scalability of critical infrastructure platforms while driving automation, operational excellence, and cloud transformation initiatives.

In this role, you will

• Administer, support, and optimize Windows Server environments (2012, 2016, 2019, and 2022).

• Manage enterprise Active Directory services including Domain Controllers, DNS, DHCP, Group Policy, AD Sites and Services, and replication.

• Administer and support Windows Failover Clustering environments.

• Lead server provisioning, patching, upgrades, lifecycle management, and performance optimization initiatives.

• Implement security hardening standards, compliance controls, and remediation activities.

• Develop PowerShell automation solutions to improve operational efficiency and reduce manual effort.

• Manage backup, recovery, and business continuity processes.

• Support AWS infrastructure services including EC2, VPC, Route 53, IAM, Security Groups, Load Balancers, CloudWatch, S3, and Systems Manager.

• Monitor, troubleshoot, and optimize cloud infrastructure, networking, and connectivity.

• Support cloud migration, modernization, and infrastructure transformation initiatives.

• Act as the escalation point for critical incidents and complex technical issues.

• Perform root cause analysis and implement preventative solutions to improve platform stability.

• Collaborate with global engineering teams, architects, security teams, and client stakeholders.

• Participate in technical governance, service reviews, and continuous improvement programs.

• Provide technical leadership and infrastructure recommendations aligned with business objectives.

Work model

We believe hybrid work is the way forward as we strive to provide flexibility wherever possible. Based on this role’s business requirements, this is a hybrid position requiring 3 days a week in a client or Cognizant office in Novi, MI. Regardless of your working arrangement, we are here to support a healthy work-life balance though our various wellbeing programs.

The working arrangements for this role are accurate as of the date of posting. This may change based on the project you’re engaged in, as well as business and client requirements. Rest assured; we will always be clear about role expectations.

What you need to have to be considered

• 10+ years of experience supporting enterprise Windows Server environments.

• Strong expertise with Windows Server 2012, 2016, 2019, and 2022.

• Deep experience administering Active Directory, Group Policy, DNS, DHCP, and AD replication services.

• Hands-on experience with Windows Failover Clustering.

• Advanced troubleshooting skills across Windows infrastructure and production environments.

• Strong PowerShell scripting and automation experience.

• Experience managing server patching, upgrades, lifecycle management, backup, and recovery.

• Hands-on experience administering and supporting AWS services including EC2, VPC, Route 53, IAM, Security Groups, Load Balancers, CloudWatch, S3, and Systems Manager in enterprise production environments.

• Experience troubleshooting cloud infrastructure and network connectivity issues.

• Understanding of AWS security best practices and governance frameworks.

• Proven experience supporting high-availability enterprise infrastructure environments.

• Strong written and verbal communication skills with customer-facing experience.

These will help you stand out

• Experience working within enterprise managed services environments.

• Knowledge of ITIL processes including Incident, Problem, Change, and Request Management.

• Experience handling Major Incident Management activities.

• Exposure to cloud migration and infrastructure modernization programs.

• Experience participating in governance reviews and service reporting.

• Operational risk management and continuous service improvement experience.

• Previous experience coordinating across multiple infrastructure and application teams.

• AWS or Microsoft infrastructure certifications such as, AWS Certified Solutions Architect – Associate, AWS Certified SysOps Administrator and Microsoft Certified: Windows Server Hybrid Administrator Associate

• ITIL Foundation Certification

We're excited to meet people who share our mission and can make an impact in a variety of ways. Don't hesitate to apply, even if you only meet the minimum requirements listed. Think about your transferable experiences and unique skills that make you stand out.

Cognizant is an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to sex, gender identity, sexual orientation, race, color, religion, national origin, disability, protected Veteran status, age, or any other characteristic protected by law.