Senior Network Security Engineer – Hybrid

Aras Kargo; Fatih; On-site; TRY 400,000 - 650,000; Full time

Benefits offered by this job

Medical & life insurance

Meal card & health benefits

Hybrid working model

Job summary

Aras Kargo is seeking a Senior Network Specialist to join our Headquarters IT team in Türkiye. You will actively participate in security-focused network infrastructure projects and ensure ongoing protection of critical systems.

The role requires 5+ years in network security, hands-on experience with Fortinet, Palo Alto, and Cisco, and strong TCP/IP knowledge. CEH/CompTIA Security+/CCNA/CCNP Security certifications are preferred. A collaborative, detail-oriented mindset is essential.

Qualifications

• Bachelor’s degree in Computer Engineering, Electronics Engineering, or related field.
• Minimum 5 years of professional experience in network security.
• Advanced knowledge in firewall, IDS/IPS, and VPN systems management.
• Deep technical knowledge of L3-L7 network protocols, TCP/IP, routing, and switching.
• Proficiency in OSI model and network protocols (TCP/IP, DNS, DHCP).
• Experience in SIEM solutions (Fortinet, QRadar, ArcSight) for log integration and network-side configuration.
• CEH, CompTIA Security+, and CCNA/CCNP Security certifications.
• Experience in vendor and third-party service provider management.
• Excellent command of English (written and spoken).
• Strong analytical thinking and problem-solving skills.

Responsibilities

• Ensure, manage, and continuously improve the security of the company’s network infrastructure.
• Configure and manage firewalls, IDS/IPS, VPN, and other network security solutions (Fortinet, Palo Alto, Cisco).
• Analyze network traffic to detect abnormal behavior, potential threats, and security vulnerabilities.
• Manage network segmentation, VLAN, and ACL configurations.
• Plan and apply security patches on network devices.
• Design and maintain network architectures in compliance with security standards (ISO 27001, NIST, CIS).
• Configure VPN (SSL/IPSec) to ensure secure remote access.
• Network Security and NAC: 802.1X, MAC Authentication, and Network Access Control
• Holds CCNA/CCNP or Aruba ACMA/ACMP certifications, or possesses knowledge at this level
• Manage DDoS protection, IDS/IPS, and NDR solutions.
• Support relevant teams during security incidents (Incident Response) by blocking network access, providing logs, and isolating traffic when necessary.
• Collaborate with SOC, Information Security, and penetration testing teams to implement network-related security measures.
• Monitor current cyber threats, security trends, and technologies to propose proactive measures.
• Contribute to Disaster Recovery (DR) and Business Continuity (BC) planning from a network perspective.
• Work closely with vendors and third-party service providers to manage network security solutions, monitor performance, and implement improvements.

Skills

Network security

Firewall management

VPN management

TCP/IP & routing

SIEM experience

Incident response

Vendor management

English proficiency

Analytical thinking

Security testing

Education

Bachelor’s degree in Computer Engineering, Electronics Engineering, or related field

Tools

Fortinet

Palo Alto

Cisco

QRadar

ArcSight

Job description

Aras Kargo is seeking a Senior Network Specialist to join our Headquarters IT team in Türkiye. You will actively participate in security-focused network infrastructure projects and ensure ongoing protection of critical systems.

The role requires 5+ years in network security, hands-on experience with Fortinet, Palo Alto, and Cisco, and strong TCP/IP knowledge. CEH/CompTIA Security+/CCNA/CCNP Security certifications are preferred. A collaborative, detail-oriented mindset is essential.