Adnan Guruhan

• Reported directly to the Chief Technology Officer (CTO), providing leadership for all IT and cybersecurity initiatives. • Oversaw the complete IT ecosystem including systems architecture, network infrastructure, daily operations and comprehensive cybersecurity protocols. • Managed strategic relationships with key vendors, outsourcing partners and technology consultants. • Spearheaded the identification, planning and implementation of critical IT infrastructure upgrades and expansions. • Developed and executed enterprise cybersecurity strategies to protect against evolving digital threats. • Ensured full compliance with SOX and GITC audit requirements through rigorous process documentation and controls. • Administered the annual IT budget, optimizing resource allocation for maximum operational impact. • Evaluated and approved all technology procurement decisions, including acquisitions. • Designed and delivered comprehensive security awareness programs to cultivate organizational cyber resilience. • Provided comprehensive technical support to end-users, resolving issues promptly to enhance user satisfaction and productivity; implemented ITIL-based service management processes to monitor and improve IT service quality. • Developed and executed robust backup and disaster recovery plans to ensure business continuity. • Managed and mentored a 3-person technical team, fostering professional growth and operational excellence. • Spearheaded technical specification development and tender processes for existing solutions, delivering cost optimization. • Successfully executed IT projects from inception to completion within the scope of SOX audits: (SD-WAN Infrastructure, Domain Controller, SIEM Solution Integration, Server Virtualization, Azure AD Migration, Enterprise End Point Security, Antispam Gateway Implementation, Privileged Access Management, VLAN Configuration , Cloud Security Architecture, Disaster Recovery Center, File Server Audit Framework)

• Reported directly to the Chief Technical Officer (CTO) while leading a 2-person technical team in daily operations. • Managed a complex multi-cloud infrastructure spanning Amazon Cloud, Google Cloud, Rapid Switch, Alpha VPS, OVH Cloud, Hetzner and OneProvider platforms. • Oversaw the entire server infrastructure including 100+ physical and virtual servers running Windows and Linux operating systems. • Implemented virtualization solutions using VMware, optimizing resource allocation and improving system efficiency. • Maintained network security infrastructure including Fortigate, Cisco ASA and Mikrotik firewall systems. • Managed networking equipment including HP Aruba switches and UnifiAPs to ensure optimal network performance. • Implemented and maintained storage solutions using QNAP systems with Veeam backup for data protection. • Deployed and managed Kaspersky antivirus solutions across all endpoints to maintain system security. • Ensured compliance with Law No. 5651 by implementing and maintaining Labris logging solutions. • Developed and documented IT department procedures to standardize operations and improve efficiency. • Played a key role in the ISO 27001 Board, implementing and maintaining information security management systems. • Led cybersecurity projects to enhance organizational security posture and mitigate potential threats. • Conducted regular information security awareness training sessions for staff members. • Evaluated and approved IT purchases and technical requirements for company acquisitions. • Coordinated with external vendors, suppliers and consultants to ensure quality service delivery.

• Provided comprehensive IT support for Galataport Istanbul's development project, including Peninsula Istanbul, Sea Port Branch Office, Customs and Governorship institutions. • Reported directly to the Deputy General Manager while managing IT team operations and activities. • Participated in budget planning processes including both operational and capital expenditures. • Prepared technical specifications and managed tender processes for Galataport Final Project's critical systems: • Network Infrastructure and Active Devices • Port Management (Established New Brand) • Firewall Security Systems • Digital Guidance Systems • Enterprise ERP Software • Served on the KVKK Compliance Board, implementing necessary data protection measures. • Developed and documented IT department procedures and operational guidelines. • Established and maintained the organization's information security framework and control mechanisms. • Coordinated IT infrastructure preparations for company relocations to new locations. • Managed relationships with outsourcing partners, suppliers and technical consultants. • Identified, planned and executed IT infrastructure requirements and improvements. • Led and coordinated a 4-person IT team, assigning tasks, monitoring performance and ensuring timely completion of all technical projects and support requests. • Evaluated and approved IT purchases and requirements for company acquisitions.

• Designed, implemented and maintained mission-critical IT infrastructure supporting Galataport Istanbul's large-scale development project, including Peninsula Istanbul, Sea Port Branch Office and government institutions. • Managed virtualized server environment using VMware. • Implemented robust security infrastructure with Fortigate firewalls 200D/100E, McAfee endpoint protection to protect sensitive data across multiple government and private sector stakeholders. • Deployed and managed enterprise-grade network solutions (Cisco, HP Aruba) to ensure seamless connectivity across all project sites and partner institutions. • Oversaw enterprise storage solutions (EMC, Lenovo) and backup systems. • Managed enterprise backup solutions using Veeam and Acronis, ensuring data protection and disaster recovery readiness for critical business systems. • Managed Cisco Call Manager IP telephony systems. • Maintained compliance with legal logging requirements (Law No. 5651). • Provided 24/7 technical support for critical systems serving high-traffic port operations and government services. • Integrated IT systems between public and private entities, ensuring compliance with government security standards.

• Implemented and maintained the critical IT infrastructure supporting Turkey's Jockey Club online betting platform, ensuring 24/7 availability and high security standards. • Managed Linux server environments, optimizing performance and security for business-critical applications. • Developed VMware virtualization solutions, improving resource utilization and reducing hardware costs. • Administered PostgreSQL database systems, ensuring data integrity and availability for transactional systems. • Configured and managed Checkpoint firewall systems to protect network infrastructure from security threats. • Maintained IIS web servers to ensure reliable operation of web-based applications and services. • Managed Netscaler load balancing solutions to optimize application delivery and availability. • Designed ODC (Offshore Development Center) infrastructure, supporting development and testing operations. • Collaborated with cross-functional teams to implement IT projects and system upgrades.

• Managed and maintained Windows Server infrastructure to ensure high availability and optimal performance for business operations. • Administered SQL database systems, ensuring data integrity, security and efficient performance. • Oversaw Microsoft Exchange Server operations, maintaining email services and troubleshooting issues. • Managed BlackBerry Enterprise Server (BES) to ensure secure mobile communication for employees. • Provided technical support to users in both headquarters and remote offices, resolving hardware and software issues.

• Installed, configured and maintained Windows Server infrastructure including Active Directory, DNS, DHCP and File Server services to ensure reliable business operations. • Managed comprehensive backup solutions to protect critical business data and ensure quick recovery when needed. • Oversaw storage systems to maintain optimal performance and capacity for organizational needs. • Provided technical support to users in both headquarters and branch offices, resolving hardware and software issues. • Implemented security best practices across servers and network infrastructure to protect sensitive company data. • Coordinated with vendors for hardware procurement and maintenance services when required.

• Designed, installed and maintained the organization's Windows Server infrastructure including Active Directory, DNS and DHCP services to ensure uninterrupted municipal operations. • Implemented group policy objects to automate software deployments and security updates. • Developed and executed comprehensive backup strategies significantly improving data recovery times. • Conducted regular disaster recovery drills to ensure business continuity. • Successfully led complete IT infrastructure deployments for newly established municipal service units. • Designed and implemented network infrastructure and server rooms for new buildings. • Implemented cost-effective hardware solutions to ensure efficient use of organizational resources. • Provided technical support to numerous municipal employees, resolving operational issues. • Improved troubleshooting processes to reduce support ticket resolution times.

• Designed and implemented the company's Windows Server infrastructure from scratch, including Active Directory, DNS and file server configurations to ensure secure and efficient data management. • Performed routine system maintenance and updates, reducing critical system failures through proactive monitoring and troubleshooting. • Provided comprehensive technical support to 50+ end-users across headquarters and other offices, resolving hardware, software and network issues. • Developed and documented IT procedures for system administration and user support, standardizing operations.

• Provided comprehensive IT consultancy and support services to client companies ensuring business operations. • Managed end-to-end Windows Server infrastructure, including installation, maintenance and administration of Active Directory, DNS and file services. • Delivered technical support to end-users, resolving hardware/software issues and minimizing downtime.