Enterprise networks
Campus, data centre, WAN and carrier architectures designed for continuity and clear operational ownership.
Istanbul · Enterprise technology
Network & Security Architecture Shaped by Operations.
I design secure, resilient infrastructure and stay close enough to operations to understand how it behaves under pressure.
Senior Network & Security Solutions Architect
Infrastructure Operations Lead
01
Perspective
From first conversation to long-term ownership.
I have spent more than 25 years translating business requirements into practical systems—across architecture, technical pre-sales, implementation, migration, troubleshooting and lifecycle operations.
Core practice
Connected disciplines, one operational view.
Work spans medium and large enterprise environments in retail, telecommunications, finance, healthcare, manufacturing, logistics, aviation, hospitality, education and energy.
Cybersecurity
Firewalls, segmentation, secure access, NAC, AAA, VPN and layered controls integrated into the wider environment.
Infrastructure operations
Linux, VMware, monitoring, automation, backup, incident response and lifecycle work grounded in hands-on practice.
Unified communications
Voice, SIP, PBX, IVR and contact-centre platforms connected to network, security and service operations.
Active operations
Platforms kept secure, available and useful.
Current hands-on responsibility across predominantly enterprise client environments, spanning architecture, administration, lifecycle work and incident response.
Cisco enterprise infrastructure
- Catalyst 9500 backbone and core switching
- Catalyst access and edge switching
- Nexus data-centre switching
- Enterprise routing platforms, BGP and resilient WAN connectivity
- Catalyst 9800 wireless controllers and access points
- Catalyst Center lifecycle and assurance
Cisco security platforms
- Cisco Secure Firewall, FTD and FMC
- Identity Services Engine (ISE)
- Duo multi-factor authentication
- Umbrella DNS-layer security
- VPN, AAA, segmentation and secure access
Production Infrastructure & Visibility
- Linux server administration
- Apache and Nginx web services
- Postfix and Dovecot email services
- DNS services
- SSL certificate services
- MySQL and MariaDB data services
- Backup, recovery and service automation
- Zabbix, LibreNMS and Cacti
- SNMP, syslog and packet-level diagnosis
Voice & Communications Operations
- FreePBX and Asterisk IP PBX and IVR platforms
- SIP/PJSIP trunks, carrier and PBX integrations
- IVR, Dynamic Route, dialplan and call-routing workflows
- Call queues, CDR, wallboards and real-time reporting
- WebSocket-based agent and queue monitoring services
- Call recording, codec conversion and web-based playback services
- Service management and troubleshooting for contact-centre applications
Installation & implementation experience
Multi-vendor delivery beyond the active estate.
Product families installed, integrated, migrated or supported through projects across the career. These are separate from the platforms currently under day-to-day management.
Campus, data centre and wireless
- Cisco Catalyst, Nexus and ISR families
- HPE and Aruba network platforms
- Ubiquiti wireless and network systems
- BGP, MPLS, RIPE and multi-carrier connectivity
Multi-vendor security
- Fortinet FortiGate
- Palo Alto Networks firewalls
- Check Point security platforms
- Secure access, NAC, VPN and segmentation integrations
Unified communications
- Ribbon and Sonus session border controllers
- FreePBX and Asterisk deployments
- SIP/PJSIP, IVR and contact-centre integrations
- Cisco IP telephony environments
Server and platform infrastructure
- HPE, Dell and Lenovo server platforms
- VMware vSphere and ESXi
- Veeam backup and recovery
- Microsoft server services, Docker and AWS workloads
Projects and recurring engagements are documented separately, without client names or confidential details.
Open the career journalCareer journal
Work documented as the practice evolves.
An anonymised, searchable record of architecture, delivery, operations and troubleshooting. Historical themes establish the context; reviewed weekly additions keep it current.
Experience
Technical depth with commercial context.
Built within technology integrators and entrepreneurial businesses, with sustained direct responsibility for corporate clients rather than a single internal IT estate.
25+years across design and operations
100+organisations in documented environments
1,700+systems and network devices documented
Figures describe documented portfolio breadth and managed environments. Proposal activity is not presented as recognised revenue or as proof that every quoted scope was delivered.
Career evidence report
The documented scope, in one page.
A concise methodology and data-volume report covering sent email, proposals, managed infrastructure and terminal evidence.