Only Candidates holding EU citizenship or a Dutch passport are eligible to apply.
About the Role
As an OS & Identity Platform SME- – Windows Server · Red Hat RHEL · Active Directory PKI, you will take ownership of critical enterprise identity and operating system platforms that underpin authentication, access, and system stability across the organization. This is a high-impact, hands-on role focused on maintaining the health, security, and resilience of Active Directory, Windows Server, and Red Hat Enterprise Linux environments.
You will operate at the heart of enterprise infrastructure, ensuring seamless authentication services, resolving complex cross-platform issues, and safeguarding identity services that business operations depend on every day.
In This Role, You Will:
Monitor and resolve Active Directory replication and domain controller health issues to ensure directory consistency and availability
Troubleshoot Kerberos authentication failures , including time skew, SPN conflicts, and ticketing errors
Maintain SYSVOL integrity and manage Group Policy (GPO) changes across enterprise environments
Respond to and remediate large-scale authentication outages impacting multiple systems and services
Diagnose and fix Windows Server and Red Hat RHEL service failures , including performance degradation and resource saturation
Execute daily and weekly health checks across domain controllers, RHEL hosts, and PKI infrastructure
Maintain and continuously update a dependency map covering DNS, VMware, Active Directory, and backup systems
Collaborate with infrastructure, security, and cloud teams to resolve complex, cross-domain incidents
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 . Regardless of your working arrangement, we support a healthy work-life balance through our wellbeing initiatives.
The working arrangements may evolve depending on client and project requirements.
What You Need to Have to Be Considered
5+ years of experience in enterprise identity and operating system operations
Strong expertise in Active Directory — replication, FSMO roles, SYSVOL, ADSI
Deep understanding of Kerberos authentication — ticket lifecycle, SPN management, NTP synchronization, delegation
Hands-on experience with Group Policy — GPO creation, RSoP analysis, ADMX templates
Solid experience in PKI (ADCS) — certificate authority hierarchy, certificate templates, CRL/OCSP management
Advanced knowledge of Windows Server — AD DS, DNS, DHCP, Event Viewer, Performance Monitor
Strong experience with Red Hat Enterprise Linux (RHEL) — systemd, SSSD/realmd (AD integration), SELinux, firewalld
Proficiency in PowerShell and Bash scripting for automation and troubleshooting
Proven ability to diagnose and resolve complex identity and OS-level issues in enterprise environments
These Will Help You Stand Out
Experience managing large-scale, multi-domain AD environments
Exposure to hybrid identity setups or integration with cloud identity providers
Familiarity with automation and configuration management tools
Strong background in incident management and root cause analysis (RCA)
Knowledge of ITIL frameworks and structured operational processes
We’re excited to meet professionals who understand the critical nature of identity platforms and can ensure their reliability at scale. Even if you meet most—but not all—requirements, we encourage you to apply.
What We Offer (Netherlands)
At Cognizant Netherlands, we provide an environment that supports your technical growth and operational excellence:
Competitive salary
Access to Udemy and Cognizant Academy
NS business card
25 paid holidays per year
Laptop and smartphone
Pension scheme
Technology-driven organization
Open team spirit
International working environment
Contact the Recruiter
Megha Nagpal
[email protected]
+31 6 2715 5643
OS & Identity Platform SME
Only Candidates holding EU citizenship or a Dutch passport are eligible to apply.
About the Role
As an OS & Identity Platform SME- – Windows Server · Red Hat RHEL · Active Directory PKI, you will take ownership of critical enterprise identity and operating system platforms that underpin authentication, access, and system stability across the organization. This is a high-impact, hands-on role focused on maintaining the health, security, and resilience of Active Directory, Windows Server, and Red Hat Enterprise Linux environments.
You will operate at the heart of enterprise infrastructure, ensuring seamless authentication services, resolving complex cross-platform issues, and safeguarding identity services that business operations depend on every day.
In This Role, You Will:
Monitor and resolve Active Directory replication and domain controller health issues to ensure directory consistency and availability
Troubleshoot Kerberos authentication failures , including time skew, SPN conflicts, and ticketing errors
Maintain SYSVOL integrity and manage Group Policy (GPO) changes across enterprise environments
Respond to and remediate large-scale authentication outages impacting multiple systems and services
Diagnose and fix Windows Server and Red Hat RHEL service failures , including performance degradation and resource saturation
Execute daily and weekly health checks across domain controllers, RHEL hosts, and PKI infrastructure
Maintain and continuously update a dependency map covering DNS, VMware, Active Directory, and backup systems
Collaborate with infrastructure, security, and cloud teams to resolve complex, cross-domain incidents
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 . Regardless of your working arrangement, we support a healthy work-life balance through our wellbeing initiatives.
The working arrangements may evolve depending on client and project requirements.
What You Need to Have to Be Considered
5+ years of experience in enterprise identity and operating system operations
Strong expertise in Active Directory — replication, FSMO roles, SYSVOL, ADSI
Deep understanding of Kerberos authentication — ticket lifecycle, SPN management, NTP synchronization, delegation
Hands-on experience with Group Policy — GPO creation, RSoP analysis, ADMX templates
Solid experience in PKI (ADCS) — certificate authority hierarchy, certificate templates, CRL/OCSP management
Advanced knowledge of Windows Server — AD DS, DNS, DHCP, Event Viewer, Performance Monitor
Strong experience with Red Hat Enterprise Linux (RHEL) — systemd, SSSD/realmd (AD integration), SELinux, firewalld
Proficiency in PowerShell and Bash scripting for automation and troubleshooting
Proven ability to diagnose and resolve complex identity and OS-level issues in enterprise environments
These Will Help You Stand Out
Experience managing large-scale, multi-domain AD environments
Exposure to hybrid identity setups or integration with cloud identity providers
Familiarity with automation and configuration management tools
Strong background in incident management and root cause analysis (RCA)
Knowledge of ITIL frameworks and structured operational processes
We’re excited to meet professionals who understand the critical nature of identity platforms and can ensure their reliability at scale. Even if you meet most—but not all—requirements, we encourage you to apply.
What We Offer (Netherlands)
At Cognizant Netherlands, we provide an environment that supports your technical growth and operational excellence:
Competitive salary
Access to Udemy and Cognizant Academy
NS business card
25 paid holidays per year
Laptop and smartphone
Pension scheme
Technology-driven organization
Open team spirit
International working environment
Contact the Recruiter
Megha Nagpal
[email protected]
+31 6 2715 5643
