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Christopher RatengICT • SECURITY
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Systems Infrastructure & Cloud Security Specialist | Software Developer | AI Automation Engineer | Independent ICT Consultant

I build, secure, automate
& maintain
technology.

I build, secure, automate, and support the technology businesses depend on. From physical networks and enterprise cloud infrastructure to secure applications and intelligent automation, I turn complex technical challenges into dependable solutions.

Explore my work Request an ICT consultation
Cybersecurity · Infrastructure · Software · AI AutomationNairobi, Kenya / Remote worldwide
Christopher Modicai Rateng
Christopher M. RatengSYSTEMS · SECURITY · AUTOMATION
01INFRA
02SEC
03CODE
SYSTEMS / 01—03
01° 17′ S / 36° 49′ E
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01The person behind the systems

Not just someone
who keeps systems running.
Someone who builds
what comes next.

I'm Christopher Modicai Rateng — a systems infrastructure & cloud security specialist | software developer | ai automation engineer | independent ict consultant, and founder of SheriaBot.

My background started in supporting real business systems — networks, endpoints, servers, users, and enterprise infrastructure. Over time, that foundation expanded into cybersecurity, software development, AI automation, and building digital products.

Today, I work across the technology lifecycle: understanding problems, designing solutions, implementing systems, securing them, and making sure they keep working. Services are available locally in Kenya, across East Africa where practical, and remotely worldwide.

Technology should be dependable, understandable, and genuinely useful to the people who rely on it.

Selected signals

Measured by the work that happens behind the interface.

5+years in infrastructure & operations
100+endpoints and users supported
200+IT assets managed
30%reduction in security incidents
02The journey

Every system
taught me
something.

From troubleshooting enterprise systems to building secure software and AI-powered products.

Sep 2019 – Dec 2019
01

IT Support Intern

Royal Media Services

Enterprise IT support in a broadcast environment, administering Active Directory and supporting more than 200 user accounts across Linux and Windows workstations.

The beginning of my career taught me how much organisations rely on technology being available, stable, and well supported.

Oct 2020 – Aug 2023
02

IT Support Specialist / Systems Administration

Sledge Group Enterprises

Multi-site IT operations spanning branch networking, 200+ IT assets, POS systems, MPLS connectivity, VoIP, and disaster-recovery procedures.

This was where I learned to manage infrastructure beyond the desktop — from structured cabling and branch connectivity to business systems and operational continuity.

Aug 2023 – Present
03

IT Support Manager

Net Scaling Solutions

Leading managed services across distributed client environments, covering Microsoft 365, identity, endpoint protection, monitoring, automation, and junior-engineer mentorship.

Supporting distributed environments strengthened my understanding of reliability, proactive security, automation, and the importance of making technical operations measurable and repeatable.

Current
04

Founder & Software Builder

SheriaBot

Founding and building a regulatory intelligence platform, combining software architecture, product development, secure APIs, AI-assisted workflows, and fintech domain knowledge.

Building SheriaBot brought together my interests in software, cybersecurity, fintech, research, and automation — turning years of practical experience into a product.

Request résumé
03How I can help

Good technology
should work harder
for your business.

I work with businesses, startups, founders, and teams that need reliable technology, practical engineering expertise, and solutions built to last.

01

Cloud Identity & Microsoft 365 Security

“Secure identities. Simpler administration.”

Microsoft 365 and identity infrastructure implementation, management and security improvements for organisations that need reliable account access, collaboration and user administration.

For: SMEs, professional firms, distributed teams, startups, and organisations migrating to Microsoft 365.

Stack: Microsoft 365 · Entra ID · Active Directory · Exchange Online · Teams · SharePoint · MFA · RBAC · PowerShell

Engagements: One-off setup · Tenant review · Migration planning · Recurring administration · Remote support

Client benefit: Secure, organised Microsoft 365 environments that help teams work reliably while reducing unnecessary access risks.

What I deliver
  • Microsoft 365 tenant setup and configuration
  • Microsoft Entra ID integration
  • Active Directory administration
  • Identity and user access management
  • MFA enforcement
  • Conditional Access configuration (subject to licence and client requirements)
  • RBAC and permissions review
  • Exchange Online administration
  • Teams and SharePoint configuration
  • User onboarding/offboarding
  • Basic tenant migration assistance
  • Security baseline configuration
Discuss Microsoft 365 Support
02

SME Cybersecurity & GRC Readiness

“Practical security for real business risks.”

Defensive cybersecurity services focused on reducing common security weaknesses, improving infrastructure protection and strengthening security governance.

For: Fintech companies, professional practices, medical centres, SACCOs, growing businesses, and organisations seeking better security hygiene.

Stack: Wazuh · Suricata · pfSense · EDR · BitLocker · Windows · Linux · Microsoft 365

Engagements: Security assessment · Implementation · Readiness review · Ongoing monitoring support

Client benefit: Understand your technology risks and take practical steps toward stronger security and audit readiness.

What I deliver
  • Authorised vulnerability assessments
  • Endpoint security reviews
  • EDR and antivirus rollout
  • BitLocker encryption deployment
  • Security baseline assessment
  • Patch management reviews
  • Identity and access security reviews
  • Firewall security assessment
  • Basic security policy and SOP development
  • Audit logging and monitoring review
  • Incident-response readiness
  • Cybersecurity awareness training
  • Technical support for compliance documentation
Book a Security Assessment
03

Network Infrastructure & Field Engineering

“Reliable connectivity, from the rack to the cloud.”

On-site and remote network engineering covering office builds, multi-site connectivity, Wi-Fi, firewalls, structured cabling and field infrastructure such as CCTV and VoIP.

For: Local offices, retail businesses, coworking spaces, hospitality businesses, SMEs, multi-branch organisations, and overseas companies requiring local field support.

Stack: Cisco · Huawei · Ubiquiti · TP-Link · VLANs · VPN · DNS · DHCP · Hikvision · LTS

Engagements: On-site installation · Infrastructure assessment · Remote configuration · Scheduled maintenance · Regional field engineering

Client benefit: Reliable connectivity and properly configured infrastructure for businesses that cannot afford avoidable downtime.

What I deliver
  • Network assessments
  • Office LAN/WAN configuration
  • Structured cabling planning and review
  • Cable labelling and rack organisation
  • Switch and router configuration
  • Cisco, Huawei, Ubiquiti and TP-Link equipment support
  • VLAN segmentation
  • DNS/DHCP configuration
  • Site-to-site and client VPNs
  • Business Wi-Fi installation
  • Ubiquiti UniFi configuration
  • Guest Wi-Fi captive portals
  • PBX and VoIP setup/support
  • CCTV installation and configuration (Hikvision/LTS)
  • POS network connectivity
  • Site surveys
  • Network troubleshooting
  • Multi-site connectivity support
Request Infrastructure Support
04

Managed IT Operations & Technical Support

“Expert technical support without unnecessary overhead.”

Remote and on-site IT operations covering endpoints, servers, user support, asset lifecycle, incident response, and technical documentation for teams that need dependable coverage.

For: SMEs, MSPs, corporate offices, distributed teams, and international companies requiring Nairobi-based support.

Stack: Windows Server · Linux · Microsoft 365 · Endpoint management · Backup tools

Engagements: One-time support · Scheduled maintenance · Project-based engagement · Monthly support retainer · On-site support · Remote support

Client benefit: Dependable technical support and maintenance without unnecessary operational disruption.

What I deliver
  • Remote support
  • Tier 1/Tier 2 technical support
  • Escalated troubleshooting
  • Hands-and-feet field support
  • Endpoint installation and deployment
  • Windows/Linux administration
  • Desktop imaging
  • Printer and peripheral support
  • IT asset lifecycle management
  • Device inventory
  • System monitoring
  • Preventive maintenance
  • Backup and recovery procedures
  • Incident documentation
  • SOP development
  • Service desk workflows
  • Vendor coordination
Request Managed IT Support
05

Web Design, Development & Digital Experiences

“Professional websites that communicate clearly.”

Business websites, corporate sites, portfolios, landing pages and web applications designed to communicate clearly, perform reliably and work across devices.

For: Small businesses, startups, SACCOs, professionals, NGOs, creative businesses, and agencies.

Stack: Next.js · TypeScript · Tailwind CSS · React · Node.js · PostgreSQL · Vercel

Engagements: Project-based build · Website redesign · Maintenance retainer · Performance audit

Client benefit: Professional, responsive websites and applications that help organisations build credibility and communicate clearly.

What I deliver
  • Business website design
  • Corporate websites
  • Personal portfolios
  • Product landing pages
  • Responsive web interfaces
  • Website redesign
  • UI/UX improvements
  • Frontend development
  • Backend API integration
  • Database-driven web applications
  • Website deployment
  • DNS and hosting configuration
  • Website maintenance
  • Basic technical SEO implementation
  • Performance and accessibility optimisation
Discuss a Website Project
06

Custom AI Solutions & Workflow Automation

“Automate the repetitive. Keep people in control.”

Design and integration of AI-assisted systems and business workflows that reduce repetitive manual tasks and connect disconnected information and applications.

For: Startups, agencies, operations teams, professional firms, fintech companies, and growing organisations.

Stack: Python · Bash · Node.js · Fastify · PostgreSQL · n8n · REST APIs · LLM integrations

Engagements: Workflow design · Integration build · Troubleshooting · Ongoing maintenance

Client benefit: Reduce repetitive work by connecting the tools your business already uses and introducing practical automation where it makes sense.

What I deliver
  • n8n workflow design
  • Self-hosted n8n setup
  • API-driven automation
  • Webhook integrations
  • Python and Bash automation
  • AI-assisted research workflows
  • LLM integration
  • Retrieval-Augmented Generation systems
  • Internal knowledge-base assistants
  • Agent orchestration
  • Document processing workflows
  • Approval systems
  • Scheduled reporting automation
  • Data pipelines
  • Workflow monitoring and troubleshooting
  • Human-in-the-loop automation
Discuss an Automation Project
07

Technical Consulting, Training & Documentation

“Clearer processes. Stronger teams.”

ICT infrastructure assessments, technical advisory, documentation, and training that help teams understand, operate and improve their technology.

For: SMEs, educational institutions, NGOs, startups, internal technology teams, and professionals.

Stack: Documentation · Training delivery · SOP frameworks · Assessment methodology

Engagements: Advisory engagement · Training session · Documentation project · Workshop

Client benefit: Practical technology guidance, clearer processes, and stronger technical capabilities within your team.

What I deliver
  • ICT infrastructure assessments
  • Technical advisory
  • IT procurement advice
  • SOP development
  • Runbooks
  • Asset documentation
  • System configuration documentation
  • Technical onboarding
  • Cybersecurity awareness
  • Microsoft 365 user training
  • Networking fundamentals
  • Linux fundamentals
  • IT support mentorship
  • Introduction to AI automation
  • Database fundamentals
  • API fundamentals
  • Technical workshops
Discuss Consulting or Training
Specialist calloutFintech & RegTech Engineering

Technical integrations, secure APIs, payment-system troubleshooting, and operational compliance workflows.

Discuss your project
Also available

Web Design, Development & Technical Implementation

Professional, responsive websites and modern web applications designed to communicate clearly, perform reliably and work across devices.

  • Business websites
  • Corporate websites
  • SACCO & financial-services sites
  • Personal portfolios
  • Website redesigns
  • Responsive user interfaces
  • Frontend development
  • Backend API integrations
  • Database-driven applications
  • Website deployment
  • Hosting and DNS configuration
  • Website maintenance
  • Performance and accessibility improvements
Explore Websites I've Built
04Technical capabilities

A broad toolkit,
applied to real
business problems.

From identity and networking to security, development and automation — the technologies I use to design, implement and maintain dependable systems.

Identity & Cloud

  • Microsoft 365
  • Microsoft Entra ID
  • Active Directory
  • MFA
  • RBAC
  • Identity lifecycle management
  • Exchange Online
  • Teams
  • SharePoint

Networking

  • Cisco
  • Huawei
  • Ubiquiti
  • TP-Link
  • LAN/WAN
  • MPLS
  • VLANs
  • DNS/DHCP
  • VPNs
  • Firewalls
  • Switch configuration
  • Structured cabling
  • Network monitoring

Field Infrastructure

  • Hardware deployment
  • Rack management
  • CCTV
  • Hikvision
  • LTS
  • VoIP/PBX
  • POS networks
  • Site surveys
  • Asset lifecycle management

Cybersecurity

  • Security hardening
  • EDR
  • Vulnerability assessment
  • Patch management
  • BitLocker
  • Wazuh
  • Suricata
  • pfSense
  • SIEM
  • Incident response
  • GRC
  • Technical security documentation

Systems

  • Windows Server
  • Linux
  • Microsoft 365
  • Endpoint management
  • System monitoring
  • Backup and disaster recovery

Development

  • JavaScript
  • TypeScript
  • Python
  • Bash
  • Node.js
  • Fastify
  • REST APIs
  • SQL
  • PostgreSQL
  • Prisma
  • Frontend web development

AI & Automation

  • n8n
  • LLM integrations
  • RAG
  • AI agent workflows
  • API automation
  • Scripting
  • Human-in-the-loop processes

Cloud & Deployment

  • Microsoft Azure
  • Vercel
  • Render
  • Railway
  • Cloudflare
  • DNS
  • HTTPS
  • Deployment support

Project & Operations

  • Incident management
  • SLA support
  • Troubleshooting
  • Technical documentation
  • SOPs
  • Asset management
  • Vendor coordination
  • User training
05Selected work

Proof is in
what you build.

A collection of software, digital experiences, infrastructure projects, and technical experiments.

06Education & research

Built on a
strong technical
foundation.

Formal academic training and active research in information systems, networking, and information security.

United States International University–Africa
United States International University–AfricaSchool of Science & Technology · Nairobi, Kenya

Bachelor of Science in Information Systems & Technology

Networking concentrationClass of 2019
United States International University–Africa
United States International University–AfricaSchool of Science & Technology · Nairobi, Kenya

Master of Science in Information Systems

Information Security specialisationIn Progress · Target Nov 2026
Active research

An Empirical Assessment of Coordinated Vulnerability Disclosure Workflow Maturity in Kenyan Mobile Money Systems.

USIU-Africa Research
USIU-AFRICAGraduate Research

Examining how organisations and independent security researchers coordinate vulnerability discovery, reporting, assessment, remediation, and responsible disclosure within Kenya’s mobile-money ecosystem.

Research interests:
  • Coordinated vulnerability disclosure
  • Financial technology security
  • Vulnerability management
  • Information security governance
  • Regulatory compliance
  • Security research
  • Secure digital financial systems

Research conducted as part of the MSc in Information Systems, Information Security specialisation, at USIU-Africa. The thesis is in progress and has not been completed or published.

07Certifications

Verified
professional
credentials.

Industry certifications across cybersecurity, networking, and information technology fundamentals.

Cisco CyberOps Associate

Cisco

2025

Cisco Ethical Hacker

Cisco

2025

IBM Cybersecurity Training

IBM

2025

IBM Governance, Risk, Compliance and Data Privacy

IBM

2025

Incident Response and Systems Forensics

IBM

2025

System and Network Security

IBM

2025

IBM Information Technology Fundamentals

IBM

2022

08Start a conversation

Available for selected projects, consulting & collaborations

Have a difficult
technical problem?

Let's make it clearer, safer, and more useful. Tell me what you're building, what's not working, or what needs to work better.

For business clients

Request an ICT consultation, or book an infrastructure & security assessment.

Request an ICT consultation Book an assessment

For engineering & employment opportunities

View my public work or request a technical résumé.

View GitHub Connect on LinkedIn Request résumé
Nairobi, Kenya Kenya, East Africa & Remote worldwide crateng13@gmail.com