IT Systems Administrator Lead

We’re seeking an IT Systems Administrator Lead to lead and deliver complex security engagements for global enterprise clients across fintech, government, and critical infrastructure. In this role, you will design and execute advanced security assessments, red team operations, and threat-informed audits.

At TeKnowledge, your work makes an impact from day one. We partner with organizations to deliver AI-First Expert Technology Services that drive meaningful impact in AI, Customer Experience, and Cybersecurity. We turn complexity into clarity and potential into progress—in a place where people lead and tech empowers.

You’ll be part of a diverse and inclusive team where trust, teamwork, and shared success fuel everything we do. We push boundaries, using advanced technologies to solve complex challenges for clients around the world.

Here, your work drives real change, and your ideas help shape the future of technology. We invest in you with top-tier training, mentorship, and career development—ensuring you stay ahead in an ever-evolving world.

Why You’ll Enjoy It Here:

• Be Part of Something Big – A growing company where your contributions matter.
• Make an Immediate Impact – Support groundbreaking technologies with real-world results.
• Work on Cutting-Edge Tech – AI, cybersecurity, and next-gen digital solutions.
• Thrive in an Inclusive Team – A culture built on trust, collaboration, and respect.
• We Care – Integrity, empathy, and purpose guide every decision.

We’re looking for innovators, problem-solvers, and experts ready to drive change and grow with us.

We Are TeKnowledge. Where People Lead and Tech Empowers.

Responsibilities:

• Maintain and optimize all aspects of IT infrastructure to ensure uninterrupted operation.
• Implement and maintain infrastructure solutions, including servers, storage systems, virtualization technologies, and cloud services.
• Establish and enforce security policies and procedures to safeguard company data and resources.
• Perform regular system updates, backups, and implement disaster recovery procedures to ensure business continuity.
• Collaborate with other teams to provide technical support and resolve infrastructure-related issues.
• Ensure compliance with IT policies, standards, and best practices.
• Participate in IT audits, such as ISO and SOC audits.
• Plan and implement infrastructure upgrades and capacity expansions to meet future business requirements.
• Stay current with industry trends and emerging technologies to recommend and implement innovative solutions.

Qualifications:

• 5+ years of experience in managing IT infrastructure in a large corporate environment.
• Bachelor’s degree in computer science, Information Systems, Engineering, or other related discipline.
• Candidate should have strong hands-on experience managing Hyper-V hosts, virtual machines, virtual switches, storage, clustering, backups, and performance monitoring. They should also understand Windows Server, Active Directory, networking, PowerShell automation, patching, troubleshooting, and disaster recovery for virtualized environments.
• Infrastructure & Security certification or relevant experience/knowledge is a requirement.
• Other security certifications—CompTIA Security+, CEH, CISSP, GCIH, OSCP, or related—are an advantage but not required.
• ITIL v4 or ISO27001 experience is an advantage but not required.
• Proficient in server administration, storage management, virtualization technologies, and cloud services (large-scale server infrastructures 500+ servers Windows/Linux).
• Proficient in client OS administration (e.g., Windows/MacOS/Linux), MDM solutions, cloud infrastructure (e.g., Azure/AWS/Google), and modern workplace technologies (e.g., Microsoft365/Google Workspace).
• Strong understanding of networking concepts, infrastructure security, and disaster recovery (multi-site / multi-region topologies with 1000+ network devices).
• Experience with IT service management practices and tools.
• Ability and experience to troubleshoot complex infrastructure issues and perform root cause analysis.
• Certification in relevant technologies (e.g., Microsoft, VMware, Cisco, PaloAlto) is a plus.
• Experience with DevOps Infrastructure Automation is a plus.
• Excellent communication and leadership skills.
• Self-motivated, detail-oriented, and able to work effectively in a team environment.
• Willingness to work on shifts, including weekend shifts (some shifts may be accommodated to employee preference).
• Must have completed the compulsory 1-year NYSC or have an exemption certificate.
• A valid and up to date National Identity Card/NIMC slip is required upon commencement of this role.

TeKnowledge is an equal opportunity employer, and we believe in celebrating – diversity, equity, and inclusion. We are committed to building an equitable environment by providing fair employment opportunities in our communities without regard to gender, ethnicity, socio-economic background, disability, marital and veteran status. Our employees join us in adopting, celebrating, and championing our drive towards building an equitable opportunity environment. We do not and will not ask you to send or share with us any sensitive personal data.