Ivan Peršić Email & Phone Number

Zagreb, Hr

Zagreb, Croatia

As a Senior Cyber Security Engineer, I design and implement advanced security strategies for a global client base, ensuring strong defenses against cyber threats.Key Achievements:Led high-impact projects for leading global corporations and government agencies, deploying advanced AD models, passwordless authentication systems, and LAPS to elevate security across complex environments.Integrated state-of-the-art authentication methods such as Windows Hello for Business, SmartCard… Show more As a Senior Cyber Security Engineer, I design and implement advanced security strategies for a global client base, ensuring strong defenses against cyber threats.Key Achievements:Led high-impact projects for leading global corporations and government agencies, deploying advanced AD models, passwordless authentication systems, and LAPS to elevate security across complex environments.Integrated state-of-the-art authentication methods such as Windows Hello for Business, SmartCard, and FIDO/FIDO2 key login for prominent international and governmental clients.Strengthened security protocols for top-tier enterprises with extensive expertise in Microsoft ADFS and SSO, across diverse platforms.Directed the implementation of advanced SSO protocols (SAML, WSFED, OIDC, OAuth2) for secure access to critical applications in both on-premises and Azure environments.Conducted AD security scans and hardening, enhancing overall security posture.Utilized BloodHound and Azure solutions to implement effective control restrictions.Enhanced network security through rigorous hardening techniques.A PowerShell master, I excel in both automation and security, crafting GUI solutions to address diverse challenges.Leveraged extensive experience to analyze and optimize Microsoft-based environments, significantly enhancing performance and security.Projects:Developed and applied AD models to streamline user access and administrative privileges. optimizing user access and administrative privileges across large-scale environments.Deployed LAPS for enhanced credential management and security in multinational corporations.Pioneered passwordless authentication solutions for high-profile clients, significantly reducing reliance on traditional methods.Directed global SSO Identity Provider (IDP) implementations, focusing on Microsoft AD FS, and established advanced security measures to protect enterprise-level systems. Show less

Zagreb, Croatia

Passionate Cyber Security Engineer orchestrating and managing security solutions for a diverse portfolio of global clients, ensuring a powerful defense against evolving threats.Key Achievements:Applied leadership skills to effectively guide teams in executing AD Tier models, deploying LAPS, and implementing passwordless solutions.Orchestrated the integration of cutting-edge passwordless alternatives, including Windows Hello for Business, SmartCard or Certificate login, and… Show more Passionate Cyber Security Engineer orchestrating and managing security solutions for a diverse portfolio of global clients, ensuring a powerful defense against evolving threats.Key Achievements:Applied leadership skills to effectively guide teams in executing AD Tier models, deploying LAPS, and implementing passwordless solutions.Orchestrated the integration of cutting-edge passwordless alternatives, including Windows Hello for Business, SmartCard or Certificate login, and FIDO/FIDO2 key login.Successfully specialized in Microsoft Active Directory Federation Services (ADFS), seamlessly integrating Single Sign-On (SSO) protocols.Proficiently managed and integrated various SSO protocols, including SAML, WSFED, OIDC, and OAuth2, enriching security measures across on-prem ADFS and Enterprise Apps in Azure.Expertise extends to network security hardening, .NET development, and proficient PowerShell scripting.Specialized in performance analysis of Microsoft-based environments, providing insightful advice based on thorough performance and memory analysis.Focused on enhancing security measures and optimizing IT performance in dynamic and complex environments.Technical Skills:.NETActive DirectoryAzurePowerShell ScriptingNetwork Security HardeningOperating Systems (Windows, macOS, Linux)Microsoft Technologies (AD DS, AD CS, AD FS, DNS, DHCP, Hyper-V, IIS, etc.)Projects:Implemented Active Directory (AD) Tier models, optimizing user access and admin privileges.Deployed Local Administrator Password Solution (LAPS) for enhanced security and credential management.Pioneered the adoption of passwordless solutions, reducing reliance on traditional authentication methods.Led the implementation of Single Sign-On (SSO) Identity Provider (IDP), focusing on Microsoft AD FS, and introduced security hardening measures. Show less

Zagreb, Croatia

Engaging in effective communication and collaboration with project and program managers, orchestrating vital client meetings to uphold and validate existing solutions, and actively contributing to the conceptualization and development of new infrastructure solutions.

Zagreb, Croatia

Overseeing shift management and organization, while addressing high-priority issues, and implementing automation for daily support tasks to enhance user support efficiency and effectiveness.

Zagreb, Croatia

Providing customer support, monitoring infrastructure, implementing ticket solutions, proactively responding to system alarms, and leading in shift organizations. Utilizing technical skills to address infrastructure and system-related concerns. Effectively communicating with customers and team members.

Zagreb, Croatia

Providing customer support, addressing user-reported issues, and proactively monitoring customer infrastructure.

Zagreb, Croatia

Specialized in IT support at both Level 1 and Level 2.Provided comprehensive assistance for hardware, operating systems, and applications.Proficient in addressing user requirements in dynamic environments.Automated routine tasks on workstations and servers using PowerShell.Played a key role in the IT Support for VIP Management Board.Involved in SCCM tasks for deploying OS images, application and driver packages, and antivirus solutions.Management of records for IT… Show more Specialized in IT support at both Level 1 and Level 2.Provided comprehensive assistance for hardware, operating systems, and applications.Proficient in addressing user requirements in dynamic environments.Automated routine tasks on workstations and servers using PowerShell.Played a key role in the IT Support for VIP Management Board.Involved in SCCM tasks for deploying OS images, application and driver packages, and antivirus solutions.Management of records for IT equipment (issue / borrowing / debt repayment).Managed antivirus solution server and client duties for a large client base.Provided 24/7 on-call support in a high-pressure environment.Extensive IT support for over 50 locations.Analysis of OS performance using tools like PERFMON, XPERF, and PAL.Specialized in Computer Security Forensics.Proficient in creating user accounts and groups across various enterprise IT systems (Exchange, CRM, AD, Billing).Skilled in working with Windows servers, covering multiple tasks and configurations. Show less

Zagreb, Croatia

Delivering on-site technical support for Business customers and offering in-store technical assistance for Residential customers. Managing the implementation and upkeep of a technical knowledge base for both internal and external users, along with conducting tests on technical equipment.

Zagreb, Croatia

Addressing and handling all customer queries, requests, complaints, and escalated issues pertaining to technical challenges and Vipnet's products and services.. Provide specialized support to Business and Residential customers at both the first and second levels.

Zagreb, Croatia

Supplying customers with sales and technical support for Vipnet's services and products, specifically tailored to meet the requirements of their respective mobile networks, including Vip and Tomato.

Network Associate Routing And Switching, Routing And Switching Protocols

Microsoft Certified Professional, Microsoft Technologies And Solutions