Technical Security Specialist

Dimension Data Solutions Limited (Kenya); Abu Dhabi; Hybrid; AED 350,000 - 650,000; Full time

Job summary

NTT DATA is seeking a Technical Security Specialist to design, implement and support enterprise networking and security solutions for clients in a hybrid working environment. You will work across Cisco, Palo Alto, Fortinet and F5 technologies, lead installations, migrations and health checks, and mentor junior engineers while coordinating vendor escalations.

Required are 7-10+ years of hands-on experience, strong troubleshooting skills, and multiple vendor certifications.

Qualifications

• Bachelor's degree in IT or a related field.
• At least one professional-level certification from a major technology vendor.
• 7-10+ years of hands-on enterprise networking and security experience.
• Experience with Cisco, Palo Alto, Fortinet and F5 technologies.
• Strong customer engagement and leadership skills.

Responsibilities

• Design, implement, configure and support enterprise network and security solutions across Cisco, Palo Alto, Fortinet and F5 technologies.
• Lead installations, migrations, upgrades and lifecycle management for LAN, WAN, SD-WAN, data centre, internet edge and security infrastructure.
• Configure and troubleshoot Cisco routing and switching, ACI and SD-WAN; Palo Alto and Fortinet firewalls; and F5 BIG-IP application delivery and security solutions.
• Work with clients onsite and remotely to gather requirements, resolve technical issues and deliver solutions.
• Perform firewall policy reviews, security hardening, VPN and NAT configuration, health checks and capacity planning.
• Investigate and resolve critical network, security and application delivery incidents, coordinating vendor escalations where required.
• Produce high-level and low-level designs, implementation and migration plans, and operational documentation.
• Support high-availability and disaster recovery designs, ensuring solutions meet customer security and governance requirements.
• Mentor junior engineers, contribute to technical workshops and presales discussions, and act as the escalation point for assigned technologies.

Skills

Network security

Cisco

Palo Alto

Fortinet

F5 BIG-IP

VPN

SD-WAN

Firewall management

Security architecture

Customer engagement

Education

Bachelor's degree in IT/CS/related field

Vendor professional certification (CCNA/CCNP/CCIE etc.)

Security certifications (CISSP/CISM/CEH)

Tools

ACI

Nexus/ISR/ Catalyst

FortiGate Manager/Analyzer

F5 BIG-IP platforms

VPN technologies

Job description

Make an impact with NTT DATA

Join a company that is pushing the boundaries of what is possible. We are renowned for our technical excellence and leading innovations, and for making a difference to our clients and society. Our workplace embraces diversity and inclusion - it's a place where you can grow, belong and thrive.

Your day at NTT DATA

The Technical Security Specialist designs, implements and supports enterprise networking and security solutions for clients. This role combines hands‑on expertise across Cisco, Palo Alto, Fortinet and F5 technologies with technical leadership, customer engagement and ownership of complex deployments and escalations.

Key responsibilities:

• Design, implement, configure and support enterprise network and security solutions across Cisco, Palo Alto, Fortinet and F5 technologies.
• Lead installations, migrations, upgrades and lifecycle management for LAN, WAN, SD-WAN, data centre, internet edge and security infrastructure.
• Configure and troubleshoot Cisco routing and switching, ACI and SD-WAN; Palo Alto and Fortinet firewalls; and F5 BIG-IP application delivery and security solutions.
• Work with clients onsite and remotely to gather requirements, resolve technical issues and deliver solutions.
• Perform firewall policy reviews, security hardening, VPN and NAT configuration, health checks and capacity planning.
• Investigate and resolve critical network, security and application delivery incidents, coordinating vendor escalations where required.
• Produce high‑level and low‑level designs, implementation and migration plans, and operational documentation.
• Support high‑availability and disaster recovery designs, ensuring solutions meet customer security and governance requirements.
• Mentor junior engineers, contribute to technical workshops and presales discussions, and act as the escalation point for assigned technologies.

To thrive in this role, you need to have:

• Strong knowledge of TCP/IP, routing and switching, including OSPF, BGP, EIGRP, MPLS, VRF, VXLAN, STP, HSRP/VRRP and multicast.
• Hands‑on experience with Cisco Catalyst, Nexus, ISR, ASR, wireless, DNA Center, ACI and SD‑WAN technologies.
• Advanced knowledge of next‑generation firewalls, IPS/IDS, IPsec and SSL VPNs, network access control, secure web gateways, Zero Trust, web application firewalls and DDoS protection.
• Experience configuring and troubleshooting Palo Alto PAN‑OS, Fortinet FortiGate, FortiManager and FortiAnalyzer, and Cisco Firepower.
• Experience deploying and managing F5 BIG‑IP LTM, GTM/DNS, APM and ASM/WAF, including load balancing, SSL offloading, certificate management and application traffic troubleshooting.
• Strong customer engagement, technical documentation, problem‑solving and communication skills, with the ability to lead workshops and mentor engineers.

Academic qualifications and certifications:

• Bachelor's degree in Information Technology, Computer Science, Electronics, Telecommunications or a related field.
• Mandatory: At least one professional‑level certification from a major technology vendor.
• Preferred certifications: CCNP Enterprise, CCNP Security, CCIE Enterprise Infrastructure or Security; PCNSA or PCNSE; FCP or FCSS Network Security; F5 Certified BIG‑IP Administrator, Technology Specialist or Solution Expert.
• CISSP, CISM, CEH, Security+ and ITIL Foundation are advantageous.

Required experience:

• 7-10+ years of hands‑on experience in enterprise networking and network security.
• At least five years of implementation and operational experience with Cisco networking technologies.
• At least five years of experience managing Palo Alto NGFW environments and five years supporting Fortinet Security Fabric and FortiGate deployments.
• Three to five years of experience with F5 BIG‑IP load balancers and WAF solutions.
• Proven delivery of complex network transformation, migration and security projects, ideally within a large enterprise, government, telecom, financial services, managed services or systems integration environment.
• Strong troubleshooting experience across routing and switching, firewalls, VPNs, SD‑WAN, load balancers and application delivery.
• Experience managing customer stakeholders and technical escalations, preparing implementation documentation, leading knowledge‑transfer sessions and mentoring engineers.

Workplace type

Hybrid Working

About NTT DATA

NTT DATA is a $30+ billion business and technology services leader, serving 75% of the Fortune Global 100. We are committed to accelerating client success and positively impacting society through responsible innovation. We are one of the world's leading AI and digital infrastructure providers, with unmatched capabilities in enterprise‑scale AI, cloud, security, connectivity, data centers and application services. Our consulting and industry solutions help organizations and society move confidently and sustainably into the digital future. As a Global Top Employer, we have experts in more than 70 countries. We also offer clients access to a robust eco