IT & Network Manager

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

Job summary

Gizli Şirket in Istanbul seeks an experienced IT & Network Manager to oversee the company’s IT infrastructure, network and cybersecurity across headquarters and field sites. You will design secure, scalable IT environments that support growth and resilience.

You will lead network security, regulatory compliance (CBDDO/ISO27001), IT/OT segregation for SCADA, disaster recovery planning and vendor management while guiding the IT team and delivering reliable end-user support.

Qualifications

• 10+ years in IT infrastructure, networking and cybersecurity.
• At least 3 years in a team lead or managerial role.
• Strong hands-on with Windows Server, VMware/Hyper-V, AD, M365.
• Excellent English, strong problem-solving and stakeholder skills.

Responsibilities

• Design, configure and secure LAN/WAN, VPN, firewall and Wi-Fi.
• Implement security policies, patch mgmt, log monitoring and incident response.
• Lead cybersecurity compliance audits incl. CBDDO / ISO 27001.
• Manage SCADA/OT network security and IT/OT segregation.
• Plan and test disaster recovery and business continuity.
• Oversee servers, virtualization, storage, backup and tech team.
• Manage IT vendors, contracts and annual budget.
• Support digital transformation and ERP infrastructure.
• Provide second-level support and end-user training with SLAs.

Skills

Networking

Cybersecurity

Team Leadership

ITIL/ISO27001

Regulatory Compliance

Education

Bachelor's degree in Computer Engineering or related

Associate's degree

Tools

Cisco

Fortinet

Palo Alto

Check Point

VMware

Hyper-V

Windows Server

Active Directory

Job description

A well-established company is looking for a highly motivated, hands-on "IT & Network Manager" to manage the company's IT infrastructure, network and cybersecurity across its headquarters and field sites. The role calls for a strong background in networking and cybersecurity, manager-level knowledge of systems administration, and the ability to build a secure, reliable and scalable IT environment that supports the company's growth.

Your Responsibilities

Network Management: Design, configure and secure LAN/WAN, VPN, firewall and Wi-Fi infrastructure at headquarters and field sites; manage network segmentation, access control, high availability and network monitoring.

Cybersecurity: Implement security policies, patch and vulnerability management, endpoint protection, log monitoring and incident response; manage firewall, IPS and related security solutions; follow up on closing penetration test and vulnerability scan findings; support compliance with KVKK and ISO 27001.

Regulatory Audits & Compliance: Take ownership of cybersecurity compliance and audits, including regulatory cybersecurity audits and the Presidential Digital Transformation Office Information and Communication Security Guide (CBDDO); prepare evidence and documentation, coordinate with auditors and follow up on corrective actions.

SCADA & OT Infrastructure: Manage the network, connectivity and security of SCADA systems at field sites; ensure secure remote access, IT/OT network segregation and monitoring in close collaboration with Operations.

Business Continuity: Plan, implement and regularly test disaster recovery and business continuity plans.

Systems Management: Coordinate the management of servers, virtualization (VMware / Hyper-V), storage and backup systems and guide the technical team; maintain enough hands-on command to step in when needed.

Vendor & Budget Management: Manage IT vendors, service contracts, software licenses and the annual IT budget.

Digital Transformation: Support digitalization projects, ERP and business application infrastructure, and process automation initiatives.

User Support: Ensure effective second-level technical support and end-user training, tracked through clear service level metrics.

Your Qualifications & Experience

Education: Associate's or Bachelor's degree in Computer Engineering, Computer Programming, Computer Technologies, Electrical & Electronics Engineering or a related field.

Experience: Minimum 10 years of experience in IT infrastructure, networking and cybersecurity, including at least 3 years in a team lead or managerial role.

Network Expertise: Advanced hands-on experience with network devices (Cisco, Fortinet, Palo Alto, Check Point, D-Link or similar), routing/switching, VPN and firewall configuration, network segmentation and network monitoring.

Cybersecurity Expertise: Hands-on experience in endpoint protection, vulnerability and patch management, log monitoring/SIEM, incident response and firewall/IPS management.

Compliance & Audit Experience: Proven experience in cybersecurity compliance and audits, preferably with regulatory cybersecurity frameworks, the CBDDO Information and Communication Security Guide and/or ISO 27001.

SCADA / OT Expertise: Hands-on experience with SCADA systems and OT networks, including remote access, IT/OT network segregation and OT security practices; knowledge of IEC 62443 is a plus.

Systems Knowledge: Manager-level knowledge of Windows Server, Active Directory, VMware / Hyper-V, Microsoft 365 and enterprise backup solutions.

Linux Knowledge: Basic to intermediate Linux knowledge (command line, user and service management, log review and basic network configuration).

Certifications: CCNA/CCNP, Fortinet NSE, Palo Alto, CISSP/CISM, CEH, ISO 27001 Lead Auditor, Microsoft/Azure or ITIL certifications are a plus.

Languages: Good command of written and spoken English.

Soft Skills: Strong problem-solving, communication and stakeholder management skills with a service-oriented mindset.

Mobility: No restrictions on travel within Turkey, especially to field sites.

Location: Residing in Istanbul.

This is an exciting opportunity for IT professionals who want to contribute to the growth of a well-established company while building a secure, resilient and future-ready digital infrastructure. Join a dynamic team and help shape the company's digital future.