Summary
Overview
Work History
Education
Skills
Timeline
Generic

ABDULLAH MARJUK

Chicago

Summary

I am visionary individual with an understanding of multimedia systems and encryption products. A bilingual Cloud Engineer known for executing network security implementations that have increased system speed and efficiency. I have had detail-oriented Network Engineer experience and a strong background in network technologies and security. Thus, my diverse experience in the IT and hardware industry I have adapted to various hardware and software troubleshooting, employee training, quality assurance, telecommunications support, analytical, problem-solving and time management skills.

Overview

8
8
years of professional experience

Work History

Senior Network Security Engineer

Pepsico
07.2022 - Current
  • Collaborated with the Senior Information Security Manager to enhance security direction for enterprise-wide initiatives, focusing on network infrastructure, perimeter defense, internal network controls, user access services, and vendor solutions.
  • Strategize and execute AOP plans for network security architecture and security toolsets, aligning with organizational goals and compliance frameworks.
  • Provide technical support for daily security operations, including change management and business continuity programs tied to firewalls, IDS/IPS, VPNs, and NAC systems.
  • Troubleshoot and resolve complex issues with network security systems such as Palo Alto, Cisco ASA, Fortinet, and proxy services, minimizing downtime and strengthening security posture.
  • Assist with large-scale security projects (segmentation, Zero Trust initiatives, secure cloud migrations), assuming ownership of ongoing support and lifecycle management.
  • Conduct penetration testing, red team/blue team simulations, and vulnerability assessments to proactively identify exploitable weaknesses and validate remediation effectiveness.
  • Design, implement, and support security tools—including firewalls, intrusion detection/prevention, and network segmentation solutions—ensuring high availability and scalability.
  • Lead enterprise-wide vulnerability management and patching programs, coordinating with IT operations to remediate high-risk findings across hybrid cloud and on-premises environments.
  • Deliver network security expertise to cross-functional teams, improving incident response times and compliance with regulatory standards.

Azure Cloud Security Engineer

Microsoft
04.2021 - 07.2022
  • Provide end user support for large enterprise clients and help troubleshoot cloud-based networking issues.
  • Experienced in infrastructure technology troubleshooted public and private cloud concepts such as Software as a Service (SaaS), Platform as a Service (PaaS), Desktop as a Service (DaaS), and Infrastructure as a Service (IaaS).
  • Designed and implemented enterprise firewall architecture using Palo Alto NGFWs and Cisco ASA/Firepower, improving perimeter defense by 40%.
  • Deployed Fortinet FortiGate firewalls in branch and cloud environments, enhancing hybrid security posture.
  • Configured IDS/IPS platforms and deep packet inspection rules to detect and block advanced threats.
  • Managed VPN infrastructure (SSL/IPsec) for 5,000+ remote users, ensuring secure remote access during large-scale workforce transitions.
  • Experience with deployments of various systems to Azure with Azure CLI, PowerShell, ARM Templates and Terraform.
  • Hands-on experience writing effective terraform scripts, Resource Templates based on Azure policies and migrating Apps to the cloud.
  • Experience in configuring and using PaaS offerings (like WebApp, Azure Database services, Azure Kubernetes, Azure DataLake, etc).
  • Analyzed networking data, troubleshooting route/switch issues, load balancing, reading wire shocks, and helping customers connect and transport data into virtual environments.
  • Experience dealing with cloud data workloads, data architecture, Azure serverless function/application design, micro-services, DevOps.
  • Identify cases that require escalation (either technically or strategically).
  • Worked with enterprise clients to secure cloud adoption and modernization efforts, focusing on Azure networking, NSGs, firewalls, and hybrid connectivity.
  • Assisted senior architects in designing and implementing network security controls across IaaS and PaaS deployments.
  • Conducted risk assessments and vulnerability scans, ensuring compliance with Microsoft security benchmarks and customer-specific standards.
  • Provided technical escalation support for complex security issues, including secure VPN gateways, ExpressRoute, and cross-region segmentation.

Cybersecurity Engineer

Accretive Health
Chicago
09.2018 - 05.2021
  • Work with developers, system/network administrators, and other
    associates to ensure secure design, development, and implementation of applications and networks.
  • Work with developers, system/network administrators, and other
    associates to ensure secure design, development, and implementation of applications and networks
  • Perform network traffic analysis using raw packet data, network flow.
  • Intrusion Detection Systems (IDS), Pass the Hash, and custom sensor output from communication networks
  • Performed and documented runbook network operations using step-by-
    step decision trees.
  • Assist the Cyber Security Manager with the development of the IA
    related Procedures, and Work Instructions.
  • Tracks performance metrics and provides timely updates to DFM
    management
  • Assists with the development of processes and procedures to improve
    incident response times, analysis of incidents, and in accordance to
    SLA’s
  • Works with clients to implement system security measures, assists with computer security plans and documentation and provides technical
    guidance and training
  • Maintained production network according to company SLAs to fulfill
    agreed-upon client specifications.
  • Installed, supported and maintained file servers and network access for
    end users.
  • Assisted various departments in maintaining network security by
    configuring remote routers and firewalls.
  • Provided hands-on troubleshooting, routing and switching to resolve
    issues with efficiency.
  • Engineered networks with L2 and L3 switching involving and switches.
  • LAN, WAN, and application data flow when planning, implementing
    and supporting network structures.
  • Contributed to development of year roadmap planning and forecasting.
  • Configured and implemented Cisco ASA firewalls to provide clients with comprehensive security, antivirus protection and virtual network
    capabilities.

Network Engineer

T-Mobile
Dallas
04.2017 - 08.2018
  • Performed and documented runbook network operations using step-by-step decision trees.
  • Maintained hardware and software for networks and assisted in installation and upgrade of servers.
  • Successfully deployed server overhaul of both wired and wireless networks for locations, completing project ahead of anticipated deadline.
  • Maximized network availability and performance by monitoring, troubleshooting, resolving outages and scheduling upgrades.
  • Responded promptly to information assurance notifications to detect vulnerabilities and protect clients.
  • Reviewed system logs to determine usage levels, bandwidth, performance, and system security to target inefficiencies and implement appropriate solutions.
  • Provided smooth communications by configuring LAN technology, wireless access points and controllers.
  • Worked on the JUNOS platform and worked with IOS upgrade of Juniper devices.
  • Designed and implemented security policies using ACL, PIX firewall.
  • Implementing security ACL, IP Sec, VPN, TACACS+ and RADIUS+.
  • Worked on Extensively on Cisco Firewalls, Cisco PIX (506E/515E/525/) & ASA5500(5510/5540) Series.
  • Cisco ASA/Checkpoint Firewall troubleshooting and policy change requests for new IP segments that either come on line or that may have been altered during various planned network changes on the network.

Education

Bachelor of Science - Cybersecurity

DePaul University
Chicago, IL
12.2014

Skills

  • Cloud software configuration
  • VXLAN design and troubleshooting
  • Automation tools and scripting
  • SaaS integration
  • Technical infrastructure migration
  • Effective communication
  • Penetration testing
  • Cloud security
  • Risk assessment
  • Incident response
  • Project management
  • Network security design
  • Virtualization security
  • Secure network architecture

Timeline

Senior Network Security Engineer

Pepsico
07.2022 - Current

Azure Cloud Security Engineer

Microsoft
04.2021 - 07.2022

Cybersecurity Engineer

Accretive Health
09.2018 - 05.2021

Network Engineer

T-Mobile
04.2017 - 08.2018

Bachelor of Science - Cybersecurity

DePaul University

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