Sr Windows Systems Engineer

Job Summary

We are seeking a seasoned and visionary Senior Windows Systems Engineer with deep expertise in Active Directory (AD), DNS, and adjacent Microsoft infrastructure technologies. Implements, configures and plays a lead role in the design of complex systems for internal and external customers. Assists in performing analysis on existing systems as well as system maintenance. Determines system specifications, input/output processes and working parameters for hardware/software compatibility. Coordinates design of subsystems and integration of total system. Identifies, analyzes and resolves program support deficiencies.

Job Responsibilities

• Provides AOD centric architectural and operational oversight for the development of new or enhanced services and/or products.
• Engineers and configures complex technical solutions for applications/systems implementations and upgrades based on specific business requirements. Solutions may be new, existing, in-house, third party or a combination.
• Researches and evaluates new technologies and software products to determine feasibility and desirability of incorporating their capabilities within the company's products.
• Formulates and executes test plans for Proof of Concepts.
• Supports development and product teams by providing high-level analysis and AOD environment-based design reviews, performance, scalability and benchmark test guidance, and subject matter expertise in technology and design.
• Perform other duties as assigned

Knowledge, Skills and Experience required for the job

• Bachelor's degree in computer science or equivalent experience.
• 5+ years of technical experience in product architecture and/or production IT environments
• Previous experience in designing and implementing systems with a focus on scalability and high availability.
• Experience with configuring and troubleshooting production environments, with at least 2 years in a senior-level role.
• Deep experience in Windows Server, Active Directory, DNS, Group Policy, and PowerShell.
• Proven track record of designing and implementing high-availability, multi-site, and secure Windows infrastructure solutions.
• Strong understanding of authentication protocols (Kerberos, NTLM, LDAP), ADFS, Azure AD, and PKI.
• Experience leading large-scale migrations, upgrades, and integration projects.

Preferred Knowledge, Skills and Experience needed for the job

• Experience with hybrid identity and cloud integration (e.g., Azure AD Connect, Microsoft Entra).
• Familiarity with Zero Trust architecture, conditional access, and identity governance.
• Knowledge of automation frameworks, infrastructure-as-code, and DevOps practices.
• Experience with compliance frameworks (e.g., NIST, ISO, SOX) and security hardening of Windows environments.

Work Environment

• Standard work environment
• Majority of time spent on PC (Phys. Req.)
• Travel required, may be domestic or international
• Weekend and off-hours support may be required

Benefits

To learn more about ACI Worldwide, visit our web site at www.aciworldwide.com. In return for your expertise, we offer growth, opportunity, and a competitive compensation and benefits package in a casual work environment.