Mohamed Warssame

I help organisations stabilize, optimise, and align their IT infrastructure through configuration review, troubleshooting, and business-IT strategy alignment.

Whether they are facing a shortage of technical expertise, planning a network transformation, migrating to AWS or Azure, preparing for Cyber Essentials Plus, or addressing security and operational risks. I provide practical solutions that deliver measurable results.

My Services, Includes:

• Network & Security Architecture Design

• Infrastructure Configuration Review

• Identity & Access Management → IAM, RBAC, MFA, SSO, directory services (AD/LDAP), privileged access management, and identity governance design concepts

• AWS & Azure Cloud Migration Planning

• Firewall Design, Migration & Optimisation ( Palo Alto & Fortinet)

• Infrastructure Modernisation & Transformation

• Cyber Essentials Plus Readiness Assessments

• Security Reviews, Risk Assessments & Gap Analysis

• Vendor & Technology Evaluation

• Technical Troubleshooting & Consultancy

• Enterprise Network Architecture

• Cisco DNA and SD-Access

• 24/7 SOC and NOC Monitoring with SolarWinds

• Cloud Network Architecture

• Cybersecurity Consulting

• Firewall Design & Implementation

• Network Segmentation

• OSPF (Open Shortest Path First)

• BGP (Border Gateway Protocol)

• 802.1X Network Authentication

• Network Access Control (NAC)

• Zero Trust Architecture

• Hybrid Cloud Networking

• incident Response and Risk Management

• Security Audit

Deliverables include:

• High-Level Design (HLD) Documentation

• Low-Level Design (LLD) Documentation

• Network & Security Architecture Blueprints

• Migration & Transformation Roadmaps

• Network Topology Diagrams

• Implementation & Build Guides

• Technical Documentation & Runbooks

• IT Operations Optimisation

• Network Troubleshooting

• System Audit & Performance Review

I deliver secure, scalable, and resilient solutions that reduce risk, improve performance, and support long-term business goals.

London | Birmingham

Led network, cloud, and cybersecurity architecture across enterprise environments covering on-prem, AWS, and Azure platforms.

Worked on the design and delivery of infrastructure and security transformation programmes, ensuring solutions were practical to implement and stable in production environments, not just designed at a conceptual level.

Supported organisations through cloud migration and modernisation, migrating ~50,000 users to AWS and Azure, upgrading 54 firewalls, and defining target-state architecture, security controls, and cloud operations.

Stood up and configured 54 firewalls as part of wider security transformation initiatives, supporting improved segmentation, control, and standardisation across environments. Implemented Identity & Access Management IAM, RBAC, MFA, SSO, directory services (AD/LDAP), privileged access management, and identity governance design concepts.

Secured corporate websites against XSS, clickjacking, and related threats

I conducted threat modelling, risk assessments, security hardening, and vulnerability management.

Migrated and modernised infrastructure across 120+ sites, improving consistency across network, security, and operational design.

Participated in SASE transformation programmes, contributing to both design and migration activities, and helping align secure access, identity, and network security into a unified model.

Worked in security architecture and compliance, translating NCSC, ISO 27001, and NIST frameworks into practical, implementable security designs

Applied a structured decision-making approach using Urgency, Importance, and Impact (UII) to prioritise work and balance risk against delivery requirements.

Produced HLD/LLD documentation, architecture diagrams, and migration/implementation guidance for engineering teams.

Supported incident investigation and root cause analysis of infrastructure and design issues.

Network Consulting / Delivery Scope.

Worked within enterprise network consulting and delivery functions, supporting architecture, design, and transformation initiatives across large-scale infrastructure environments.

Conducted assessment of existing network environments, identifying design gaps, performance constraints, and security vulnerabilities across enterprise infrastructure.

Secured corporate websites using security headers and web security best practices.

Contributed to the design and enhancement of network architectures, improving scalability, resilience, and operational efficiency across distributed environments.

Provided technical input into network security and infrastructure upgrade programmes, including performance optimisation and scalable architecture improvements aligned with enterprise security standards.

Supported network and security transformation initiatives (including Supernova Security programme), contributing to design alignment, implementation readiness, and delivery coordination.

Assisted with implementation planning and delivery validation across network, cloud, and security solutions, ensuring architectural consistency and documentation quality across engineering teams.

Key Roles & Impact (Design-Focused)

F5 → load balancing, application delivery, and traffic management design concepts and configuration review

Cisco Networking → enterprise routing & switching design (OSPF, BGP, VLAN architecture)

Network Design → HLD / LLD design input and technical documentation support

Enterprise Networking → large-scale infrastructure design considerations and architecture alignment

Network Security → segmentation design, NAC, 802.1X, and Zero Trust architecture principles

Cloud Networking → DNS, DHCP, security optimisation, and hybrid connectivity design concepts

Firewall Migration → security transformation design input and migration planning support

NAC / 802.1X → identity-based access control design and policy framework support