System Administration and Security Specialist

Aygaz; Fatih; On-site; TRY 600,000 - 900,000; Full time

Job summary

Aygaz AS seeks an experienced Cloud Infrastructure professional to design and optimize Azure environments, manage cost, and secure networks in a hybrid on-prem plus cloud setup. You will administer Microsoft 365 services and enforce Zero Trust with Entra ID and MFA.

Applicants should have 5+ years in cloud infrastructure, strong English, and proven crisis management and documentation skills. This is an on-site role in Marmara region, Fatih, Istanbul.

Qualifications

• Graduate from related departments (CompEng, EEE, etc.).
• At least 5 years in cloud and system infrastructure.
• Strong operational and management experience in Azure and Microsoft 365.
• Experience in Hybrid on-prem + cloud architectures.
• Proficient in Linux and Windows Server systems.
• Good level of technical English.
• Advanced analytical thinking, problem-solving and crisis management.
• Disciplined in documentation and process management with proactive work approach.

Responsibilities

• Design, install, and improve Azure infrastructure.
• Manage Azure cost optimization and resource utilization.
• Manage Azure network components (VNet, subnet, NSG, route table, VPN, peering).
• Administer Microsoft 365 services (Exchange Online, Teams, SharePoint, OneDrive).
• Manage Microsoft Defender product family (Cloud, Office 365, Endpoint).
• Manage Microsoft Entra ID (Azure AD), Conditional Access, identity management processes.
• Monitor Azure Security Center recommendations and improve Secure Score.
• Track Microsoft Purview (Compliance) processes and enforce Zero Trust with Conditional Access and MFA/PIM; automate with Azure Policy.
• Manage Windows Server and Active Directory infra.
• Knowledge VMware virtualization environments.
• Execute Backup, DR, and BC processes.
• Participate in infra projects and improve ops processes.
• Handle TCP/IP, DNS, DHCP, Firewall, and basic networking.
• Monitor performance, plan capacity, and optimize systems.
• Apply security best practices and Zero Trust approach.
• Familiar with ISO 27001 and KVKK / GDPR regulatory processes.

Skills

Cloud infrastructure

Hybrid architectures

Documentation

Crisis management

Technical English

Operational management

Proactive work

Education

Related technical degree

Tools

Azure

Microsoft 365

VMware

Windows Server

Linux (Ubuntu/CentOS)

Azure AD / Entra ID

Azure Networking (VNet, NSG)

Azure Security Center

Job description

• Graduate of related departments from universities (Computer Engineering, Electrical-Electronics Engineering, etc.)
• At least 5 years of experience in cloud and system infrastructure fields
• Strong operational and management experience in Microsoft Azure and Microsoft 365 environments
• Experienced in Hybrid (on-prem + cloud) architectures
• Proficient in Linux (preferably Ubuntu, CentOS) and Windows Server systems
• Good level of technical English
• Advanced analytical thinking, problem-solving, and crisis management skills
• Disciplined in documentation and process management with a proactive work approach

Technical Responsibilities

• Design, installation, and continuous improvement of Azure infrastructure
• Management of Azure cost optimization and resource utilization
• Management of Azure network components (VNet, subnet, NSG, route table, VPN, peering)
• Administration of Microsoft 365 services (Exchange Online, Teams, SharePoint, OneDrive)
• Management of the Microsoft Defender product family (Cloud, Office 365, Endpoint)
• Management of Microsoft Entra ID (Azure AD), Conditional Access, and identity management processes
• Monitoring Azure Security Center recommendations and increasing the security level (Secure Score) of systems
• Tracking Microsoft Purview (Compliance) processes, managing identity based on the "Zero Trust" model (Conditional Access, MFA/PIM), and automating security standards with Azure Policy
• Management of Windows Server and Active Directory infrastructure
• Knowledgeable in VMware virtualization environments
• Execution of Backup, Disaster Recovery, and Business Continuity processes
• Taking an active role in infrastructure projects and improving operational processes
• Command of TCP/IP, DNS, DHCP, Firewall, and basic networking concepts
• Experience in performance monitoring, capacity planning, and system optimization
• Knowledge of security best practices and the Zero Trust approach
• Proficiency in regulatory processes such as ISO 27001 and KVKK / GDPR