Muhammad Kaleem
Security Consultant @Virgin Media O2
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WORK HISTORY
Security Consultant @Virgin Media O2
London, GB
Designed and optimized multi-vendor network and security solutions across enterprise and VDC environments. Managed advanced routing, switching, VPN, and firewall deployments (Cisco ASA, Palo Alto, Fortinet, Juniper). Led customer requirement-gathering sessions, providing expert security knowledge and aligning solutions with business goals. Delivered security design, guidance, and technical approval for new projects, ensuring compliance with corporate security policies. Implemented security infrastructure including firewalls, remote access, URL filtering, IPS/IDS, vulnerability management, and DDoS protection. Ensured Security Operational Acceptance criteria were met for new deployments, addressing gaps proactively. Completed multiple projects successfully, including Cisco ASA to Fortinet migration with 99% uptime
EDUCATION
Middlesex University
Master of Science (MSc), Computer Networks And Security
Arid Agriculture University
Bachelor of Science (BS), Information Technology
SKILLS
ABOUT MUHAMMAD KALEEM
I\'m a Network Security and Cybersecurity professional, and for over ten years, I\'ve been immersed in building, securing, and optimizing serious, large-scale enterprise and service provider environments. Early on, I realized that good security isn\'t just about the tech, it\'s not just another firewall or a complex protocol. It\'s the foundation of trust and reliability for an organization. My whole focus has been on protecting people and the systems they rely on, always aiming to build infrastructures that are both rock-solid and high-performing. I believe our job is to create security solutions that truly safeguard organizations without ever becoming a choke point for innovation.On the technical side, I\'ve spent years deep in the trenches with Cisco, Fortinet, Palo Alto, Juniper, and F5. I hold certifications like the CISSP and CCIE (Service Provider), but honestly, those are just markers of time spent. They really represent thousands of hours of dedicated, hands-on problem-solving and a genuine passion for staying sharp and ahead of the curve in this extremely challenging field.Throughout my career, I have delivered complex security programs for telecom, financial services, and enterprise data center environments. This includes:• Zero Trust and defense-in-depth security architecture• Firewall design, migration and optimization (Cisco ASA to Fortinet or Palo Alto)• IPS/IDS, URL filtering, VPN, SD-WAN and secure remote access• MPLS, BGP, EIGRP, OSPF, VRF, QoS and multi-data-center routing• PCI DSS assessments, compliance work and gap remediation• High availability, disaster recovery and infrastructure resilience• Load balancing and application delivery with F5 (LTM, VIP, SSL, iApp)I\'m valued for being both technically sharp and highly collaborative. I focus on simplifying complex security challenges into clear, actionable terms, ensuring teams can make confident, informed decisions. My work, whether it’s designing secure hybrid architectures, leading large-scale migrations, or giving security assurance to new projects, always prioritizes solutions that are secure, scalable, and directly aligned with business objectives.What truly motivates me is the constant need to keep learning and helping organizations remain strong against a constantly shifting threat landscape. Security is a continuous process, and I approach it with that mindset. My ultimate goal is simply to create resilient environments where people feel protected and innovation can thrive without fear.
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