Senior Active Directory & Identity Security Specialist

Outokumpu Chrome Oy; Katowice; On-site; PLN 120,000 - 180,000; Full time

Job summary

Outokumpu Chrome Oy in Katowice, Poland, is seeking an Active Directory Specialist to maintain and secure directory services that support our global business. You will manage AD DS, DNS, Group Policy, and AD CS, ensuring reliability, security, and compliance across on-prem and hybrid environments.

The role requires 5+ years of enterprise AD administration, strong troubleshooting for authentication issues, and fluency in English.

Qualifications

• Bachelor's degree in IT, Information Systems, or equivalent.
• 5+ years of enterprise Active Directory administration.
• Strong knowledge of AD DS, DNS, Group Policy, AD CS, trusts, replication, Kerberos, and LDAP.
• Experience resolving complex authentication and identity issues.
• Familiarity with ITIL processes and change management.
• PowerShell scripting is a plus.

Responsibilities

• Manage and improve Active Directory services, including AD DS, DNS, Group Policy, AD CS, trusts, replication, and service accounts.
• Provide expert 2nd and 3rd level support and participate in an on-call rotation.
• Lead troubleshooting and root cause analysis for authentication, authorization, Kerberos, LDAP, DNS, replication, and Group Policy issues.
• Plan and implement AD upgrades, patching, testing, and lifecycle activities to ensure platform stability and compliance.
• Translate security requirements into AD best practices, including least privilege and privileged access governance.
• Drive standardization, automation, monitoring, documentation, and improvements across the AD environment.
• Support audits, access reviews, risk remediation, and security compliance initiatives.
• Collaborate with Cyber Security, Infrastructure, OT teams, suppliers, and business stakeholders to deliver reliable directory services.
• Mentor colleagues and contribute to continuous improvement across the Infrastructure team.

Skills

Active Directory administration

AD DS

DNS

Group Policy

LDAP

Kerberos

Troubleshooting authentication

ITIL awareness

English fluency

Education

Bachelor's degree in IT, Information Systems, or equivalent experience

Tools

PowerShell

Job description

Outokumpu Chrome Oy in Katowice, Poland, is seeking an Active Directory Specialist to maintain and secure directory services that support our global business. You will manage AD DS, DNS, Group Policy, and AD CS, ensuring reliability, security, and compliance across on-prem and hybrid environments.

The role requires 5+ years of enterprise AD administration, strong troubleshooting for authentication issues, and fluency in English.