1239 Senior Network Security Engineer jobs in Nairobi

• Design, implement, and maintain network security infrastructure, including firewalls, VPNs, IDS/IPS, and SIEM systems.
• Monitor network traffic for security threats and vulnerabilities.
• Conduct regular security assessments, vulnerability scans, and penetration tests.
• Develop and enforce network security policies and procedures.
• Respond to and resolve security incidents in a timely and effective manner.
• Configure and manage secure network devices (routers, switches, firewalls).
• Collaborate with cross-functional teams to integrate security into network architecture.
• Stay up-to-date with the latest security threats, trends, and technologies.
• Develop and deliver security awareness training to employees.
• Maintain accurate documentation of network security configurations and procedures.
• Ensure compliance with industry regulations and security standards.
• Provide technical expertise and support for security-related issues in a remote environment.

• Bachelor's degree in Computer Science, Information Technology, Cybersecurity, or a related field.
• Minimum of 4 years of experience in network security engineering.
• Strong understanding of TCP/IP, routing protocols, and network architectures.
• Hands-on experience with firewalls (e.g., Cisco ASA, Palo Alto), VPNs, and intrusion detection/prevention systems.
• Experience with SIEM tools and security monitoring platforms.
• Knowledge of cybersecurity frameworks (e.g., NIST, ISO 27001).
• Relevant security certifications (e.g., CISSP, CCNA Security, CompTIA Security+) are highly desirable.
• Excellent problem-solving and analytical skills.
• Strong communication and interpersonal skills, particularly in a remote setting.
• Ability to work independently and as part of a distributed team.

• Design, implement, and maintain enterprise-level network security architectures, including firewalls, VPNs, intrusion detection/prevention systems, and access control mechanisms.
• Develop and enforce network security policies, standards, and procedures.
• Monitor network traffic for security breaches, anomalies, and potential threats, and respond effectively to incidents.
• Conduct regular security assessments, vulnerability scans, and penetration tests to identify and mitigate risks.
• Manage and optimize security technologies to ensure their effectiveness and efficiency.
• Lead security incident response efforts, including investigation, containment, eradication, and recovery.
• Collaborate with IT infrastructure teams to ensure secure network configurations and implementations.
• Provide technical leadership and mentorship to junior security engineers.
• Stay abreast of the latest cybersecurity threats, vulnerabilities, and technologies, and recommend appropriate countermeasures.
• Develop and deliver security awareness training to employees.
• Ensure compliance with relevant security regulations and standards.

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 Network Security Engineer L3 is a seasoned subject matter expert, responsible for providing technical support to clients.

This role is able to compile technical specifications in a clear, concise, unambiguous manner to explain the advantages and disadvantages of options leading to the final solution and are able to create alternative solutions as backup planning.

This role works towards professional to expert level certification, whilst at the same time developing business knowledge

Key Responsibilities:

• Taking ownership of project deployments working closely with the project management team and the clients
• Interacts with clients on site and remote to meet complex requirements of a solution.
• Responds to escalated client requests.
• Escalates complex problems to the relevant OEM support and taking ownership of the cases to closure.
• Writes reports and proposals and completes and maintains project documentation.
• Acts as coach and mentor to more junior Implementation Engineers and Technicians.
• Assumes responsibility for the coordination of the activities of the junior Engineers, in line with performance targets.
• Included in higher complexity design work, with input to the design expected.
• Expected to take ownership of relevant technologies according to domain or specialization.
• Engagement with clients on issues related to optimization of existing security infrastructure as well as on new solution areas
• Performs any other related task as required.

Knowledge and Attributes:

• Seasoned understanding and appreciation of Cybersecurity technical design
• Seasoned project skills which are demonstrated in the execution of installations and other assignments.
• Excellent customer engagement skills
• Demonstrate relevant domain specialist knowledge.
• Excellent verbal communication skills.
• Client focused and displays a proactive approach to solving problems.
• Ability to work under pressure.
• Ability to coach, mentor and provide guidance to team members.
• Seasoned knowledge on security concepts and application of those concepts.
• Seasoned knowledge in security architecture.
• Seasoned knowledge of security technologies and understanding of managed services concepts
• Seasoned knowledge of security monitoring and management tools for performance optimization and troubleshooting

Academic Qualifications and Certifications:

• Bachelor's degree or equivalent in Information Technology or Computing or a related field
• Vendor certification is mandatory.
• CCSE / Palo Alto Network Security Professional / FCP / CCNP Security / F5-CTS BIG-IP ASM or equivalent preferred.
• Security certifications like AZ-500, SC-200, Security+, CEH, CISSP, CISM or similar Certification in different networking technologies such as CCDP Security, JNCIA, ACCA, PCNSE, PCNSC, FCP, CCSA, ITIL, Azure Security Engineer, Azure Certified DevOps Engineer, Azure Certified Network Engineer, Azure Administrator Associate, will be an advantage.

Required experience:

• Seasoned experience in Network Security projects implementation in complex environment.
• Seasoned experience in Next Generation Firewalls implementation and support.
• Seasoned experience in NAC implementation and support.
• Seasoned experience in WAF implementation and support.
• Seasoned Experience in Security technologies Web Security, Email Security, NAC, SSE, VPN solutions, End Point Security etc.
• Specialist experience in technical support to clients.
• Seasoned experience in handling incidents end to end.

Workplace type:
Hybrid Working

About NTT DATA
NTT DATA is a $30+ billion trusted global innovator of business and technology services. We serve 75% of the Fortune Global 100 and are committed to helping clients innovate, optimize and transform for long-term success. We invest over $3.6 billion each year in R&D to help organizations and society move confidently and sustainably into the digital future. As a Global Top Employer, we have diverse experts in more than 50 countries and a robust partner ecosystem of established and start-up companies. Our services include business and technology consulting, data and artificial intelligence, industry solutions, as well as the development, implementation and management of applications, infrastructure, and connectivity. We are also one of the leading providers of digital and AI infrastructure in the world. NTT DATA is part of NTT Group and headquartered in Tokyo.

Equal Opportunity Employer
NTT DATA is proud to be an Equal Opportunity Employer with a global culture that embraces diversity. We are committed to providing an environment free of unfair discrimination and harassment. We do not discriminate based on age, race, colour, gender, sexual orientation, religion, nationality, disability, pregnancy, marital status, veteran status, or any other protected category. Join our growing global team and accelerate your career with us. Apply today.

Third parties fraudulently posing as NTT DATA recruiters
NTT DATA recruiters will never ask job seekers or candidates for payment or banking information during the recruitment process, for any reason. Please remain vigilant of third parties who may attempt to impersonate NTT DATA recruiters—whether in writing or by phone—in order to deceptively obtain personal data or money from you. All email communications from an NTT DATA recruiter will come from an

email address. If you suspect any fraudulent activity, please
contact us
.

• Design, deploy, and manage firewalls, intrusion detection/prevention systems (IDPS), VPNs, and other security appliances.
• Monitor network traffic and security alerts for suspicious activity, investigating and responding to security incidents.
• Develop and implement network security policies, procedures, and standards.
• Conduct regular security audits, vulnerability assessments, and penetration testing.
• Develop and maintain incident response plans and playbooks.
• Collaborate with IT teams to ensure security is integrated into all aspects of network design and operations.
• Stay abreast of emerging security threats, vulnerabilities, and technologies.
• Provide technical guidance and mentorship to junior security staff.
• Manage security infrastructure, including hardware and software updates, patching, and configuration.
• Ensure compliance with relevant security regulations and standards.
• Develop and deliver security awareness training to employees.
• Architect and implement secure network solutions for cloud environments (AWS, Azure, GCP).
• Troubleshoot and resolve complex network security issues.
• Document network security architecture, configurations, and procedures.

• Bachelor's degree in Computer Science, Information Technology, Cybersecurity, or a related field.
• Minimum of 7 years of experience in network security engineering.
• In-depth knowledge of TCP/IP, routing protocols, and network infrastructure.
• Hands-on experience with various security technologies, including firewalls (e.g., Palo Alto, Cisco ASA), IDPS, SIEM (e.g., Splunk, QRadar), and endpoint security solutions.
• Strong understanding of encryption, authentication, and access control mechanisms.
• Experience with cloud security principles and best practices.
• Relevant certifications such as CISSP, CCIE Security, CCNP Security, or GIAC are highly desirable.
• Excellent analytical, problem-solving, and troubleshooting skills.
• Strong communication and interpersonal skills, with the ability to explain technical concepts to non-technical audiences.
• Ability to work effectively both independently and as part of a team.