Halil İbrahim
Sakallı
SENIOR NETWORK & INFORMATION SECURITY SPECIALIST
I design and operate the perimeter — firewalls, WAF, EDR and DNS security layers that keep networks standing after everything else has failed once already.
Four years of keeping other people's networks quiet.
I'm Halil İbrahim Sakallı, a Network and Information Security Specialist with over four years of experience delivering security solutions across a range of client environments — from single-site offices to multi-branch enterprise networks.
My day-to-day covers firewall configuration and management, Web Application Firewall (WAF) implementation, switch configuration, Endpoint Detection and Response (EDR), Picus Security validation, Privileged Access Management (PAM), and Cloudflare DNS/WAF hardening — with enough frontend development on the side to build and maintain this site myself.
Career log
Four roles, one thread: harden the perimeter, then teach the next person to hold it.
Senior Network and Information Security Specialist
MikrogrupProviding comprehensive network and security support, implementing advanced security measures, managing firewall configurations, and ensuring robust network infrastructure protection. Leading security projects and mentoring junior team members.
Network and Information Security Specialist
ZerosecondProvided expert network and information security solutions to various companies. Specialized in firewall implementation, security auditing, vulnerability assessments, and developing customized security protocols for diverse client needs.
Network and Security Specialist Intern
ZerosecondStarted my professional career with an intensive internship. Gained hands-on experience in network configuration, security monitoring, and incident response procedures, assisting senior specialists in implementing security solutions.
B.Sc. Electrical & Electronics Engineering
Mersin UniversityGraduated with honors. Focused on network systems, digital communications, and security protocols, completing several projects on network security and system protection.
Deployments
A few representative engagements across firewall, DNS/WAF and network access layers.
Firewall configuration & support
Comprehensive firewall implementation including integration into non-firewall structures, detailed configuration, ongoing maintenance, and 24/7 technical support.
Cloudflare DNS & WAF hardening
Complete Cloudflare DNS infrastructure setup with advanced WAF rule configuration, DDoS protection, bot management and CDN/caching optimization.
AP & switch configuration
Enterprise-level access point and switch configuration for internal network security and access control, with VLAN segmentation and wireless hardening.
Let's talk security.
Open to new opportunities and collaborations — reach out through any channel below.