Senior System Administrator

Gizli Şirket; Fatih; On-site; TRY 240,000 - 360,000; Full time

Job summary

Gizli Şirket in Turkey seeks a Senior System Administrator with 5+ years to lead Windows server and infrastructure tasks. You will design automation in PowerShell, manage Hyper-V, AD, Exchange, SCCM, and ensure 7x24 reliability.

The role emphasizes security, documentation, and collaboration with IT teams to maintain robust, compliant systems. The ideal candidate will implement best practices, coordinate with cross-functional teams, and contribute to strategic IT planning while supporting

Qualifications

• BSc in Computer Science/Engineering or equivalent.
• Extensive experience with Hyper-V, AD, Exchange and SCCM.
• Strong PowerShell scripting and automation skills.
• Proven ability to design, implement, and document IT infrastructure.
• Excellent communication and ITIL awareness.

Responsibilities

• Design and create PowerShell scripts for daily operations.
• Troubleshoot production issues with 7x24 support.
• Monitor and tune system performance.
• Plan software upgrades and capacity annually.
• Maintain security documentation per ISMS.
• Prepare tender docs and technical designs.
• Support IT issues not covered by standard services.
• Advise on hardware/software purchases.

Skills

Windows Server administration

Active Directory / GPO

PowerShell scripting

Hyper-V virtualization

Exchange Server / O365

ITIL Change & Configuration Mgmt

Networking basics

Documentation & reporting

Security/compliance

Education

Bachelor's degree in Computer Science/Computer Engineering or similar

Tools

Hyper-V

SCVMM

SCCM

WSUS

Active Directory

DNS/DHCP

Group Policy

IIS

PKI / Certificate Services

O365/Hybrid

Job description

We believe that highly competitive solutions can only be developed by the motivated and enthusiastic team. That’s why our team members have been selected among the top engineers and specialists in the market. We have an urgent requirement for bright a Senior System Administrator with minimum 5 years of experience.

KEY RESPONSIBILITIES

• Design and create Powershell scripts according to the needs of daily operation / routine jobs.
• Troubleshooting of production issues, provide expedited resolution and 7x24 support for mission-critical systems,
• Performance monitoring and tuning,
• Perform long-term planning for software upgrades and prepare annual capacity plans,
• Establish and maintain policies and procedures,
• Keeping infrastructure documentation up to date, reviewing and revising if necessary,
• Preparing as well as enforcing information security management system documentation
• Preparing tender documentation such as solution descriptions, high or low-level designs, technical BoQs.
• Support for IT issues not treated by EUSS (infrastructure/software related).
• Support the purchase and maintenance of IT equipment and services, in particular, give recommendations for the selection of technical solutions of hardware and software.

GENERAL QUALIFICATIONS

• BSc degree in Computer Science/Computer Engineering or similar academic disciplines
• Knowledge and experience on Hyper-V Virtualization Platform, Failover Cluster, Certification Authority, File Server, Print Server, Remote Desktop Services, Wsus, Volume Activation Services (KMS), Windows Deployment Services, Bitlocker,
• Knowledge and deep experience on Microsoft Exchange Server and O365/Hybrid environments,
• Knowledge and experience on Microsoft Endpoint Configuration Manager, SC Virtual Machine Manager, SC Orchestrator,
• Microsoft Windows Patch Management via WSUS / SCCM,
• Knowledge of reporting and query tools and practices and create custom queries, reports via SCCM,
• Strong administration experience on Windows 2012/2016 server – Forest, Domain trust, AD, Client, DNS, WINS, DHCP, Group Policy, Distribution lists, Windows folder security, and IP filter.
• Expert level knowledge at Active Directory LDAP service, shell scripting, Certificate services (PKI), AD Site Topology - all under a multi-site multi-domain Windows 2012/2016 environment.
• Experince in designing and implementing Microsoft Clustering and load balancing.
• Experience administrating, configuring, troubleshooting IIS6, IIS7 and IIS8
• Excellent communication and documentation skills.
• Positive attitude, strong work ethic; a team player who shows commitment and dedication to the job.
• Integrity, reliability, adaptability, confidence, open-mindedness, and promptness.
• Proficiency in ITIL concepts for Change Management and Configuration Management is a plus. MCSA: Windows Server, etc.