Mohamed Khalaf
Senior System Engineer
Cairo
Overview
22
22
years of professional experience
2
2
Certifications
9
9
Languages
Work History
Senior System Engineer
Avas Flowers
04.2024 - Current
- Manage end-to-end infrastructure planning and implementation while leading a technical team to deliver scalable solutions for business requirements.
- Maintain 99.9% uptime for critical business websites and services through proactive monitoring and multi-platform system management.
- Enhance infrastructure security and performance via systematic patch management, software updates, and policy implementation.
- Support development teams with environment setup and CI/CD pipeline optimization for streamlined production deployments.
Linux System Administrator / VOIP / Network / Telecommunication
Ministry of Defence of Egypt
06.2003 - 07.2024
- Progressed from Lieutenant to Colonel over 21 years, leading telecommunication operations and IT infrastructure for critical defense systems.
- Managed and optimized analog/digital PBXs, microwave, fiber optic, and GPON networks ensuring 99.99% uptime.
- Administered Linux servers, VoIP systems (Cisco, Asterisk, Mitel), and network devices (Cisco, Mikrotik, HP).
- Coached and mentored junior system administrators (10 hours/week), enhancing their performance and knowledge transfer.
- Led implementation and maintenance of secure communication platforms for over 5000 users.
Linux System Administrator
Evolvice GmbH / Sceel.io GmbH
01.2020 - 01.2023
- Administered and secured Linux environments, VoIP systems, and web hosting platforms (Nginx, Apache).
- Administered secure Linux environments and managed enterprise VoIP systems alongside high-performance web hosting infrastructure using Nginx and Apache.
- Deployed and maintained cloud services with Hyper-V virtualization and Docker containerization for scalable application delivery.
- Orchestrated database operations and automated CI/CD workflows through GitLab and TeamCity while managing project workflows via Atlassian suite (Jira, Confluence).
- Ensured optimal performance and high availability for WordPress and Tomcat applications through proactive monitoring and maintenance.
Linux System Administrator
Nroo-inc
01.2014 - 07.2014
- Provided Linux administration and support for mission-critical applications in a fast-paced environment.
- Configured and maintained high-performance web hosting infrastructure using Nginx and Apache servers with specialized WordPress optimization.
- Deployed multiple WordPress and web applications improving Performance and security.
- Monitored and maintained WordPress websites alongside Tomcat applications, ensuring consistent uptime and optimal performance.
Senior System Engineer
Jiffy Software
01.2013 - 11.2013
- Configured and hardened Linux systems while managing company phone infrastructure and fine-tuning web hosting platforms (Nginx, Apache).
- Established cloud environments to support development teams with flexible, scalable application hosting.
- Maintained critical WordPress and Tomcat services by proactively troubleshooting and optimizing system performance.
System Adminstrator / Voip Administrator
Booyah Australia
03.2012 - 04.2013
- Delivered system and VoIP administration services, optimizing network performance and reliability.
- Managed enterprise network infrastructure and FreePBX VoIP systems to ensure seamless communication and connectivity.
- Configured VPN solutions and voice routing protocols to support secure remote access and reliable telephony services.
- Monitored network performance and call quality while implementing security measures across voice and data networks.
- Troubleshot network connectivity and VoIP issues while maintaining system updates and performance optimization.
Education
Postgraduate Diploma - Computer Science
Faculty of Graduate Studies For Statistical Research, Cairo University
Cairo, Egypt 04.2001 -
Skills
Linux (RHEL CentOS Ubuntu Debian)
Virtualization (Vmware -Hyper-V )
Terraform / Ansible / Kubernetes / Docker / Jenkins
WHMcPanel / WHMC S - Web Host Manager Complete Solution
Databases (MySql / MariaDB
Firewalls ( Fortigate - IPtables- CSF )
VOIP / Asterisk /FreePBX /3CX
CISCO Networks (Cisco Routers / Switches / CUCM )
Wireshark / VMware / GitLab / Networking / VPN / System Administration / DNS
LDAP/SAML20 and SSO
Network infrastructure networking and troubleshooting / RouterOS (MikroTik)
Git, Github, GitLab, Teamcity, Jenkins
Certification
CCNA Training
COMMUNICATION AND INTERPERSONAL SKILLS
- Personal Skills
- Very Ambitious, Creative, Organized, Very good Team Leader and Team member, Hard Worker with in a Smart Way, Passionate about my Work as I do what I really love.
Timeline
Senior System Engineer
Avas Flowers
04.2024 - Current
Linux System Administrator
Evolvice GmbH / Sceel.io GmbH
01.2020 - 01.2023
Linux System Administrator
Nroo-inc
01.2014 - 07.2014
Senior System Engineer
Jiffy Software
01.2013 - 11.2013
System Adminstrator / Voip Administrator
Booyah Australia
03.2012 - 04.2013
Linux System Administrator / VOIP / Network / Telecommunication
Ministry of Defence of Egypt
06.2003 - 07.2024
Postgraduate Diploma - Computer Science
Faculty of Graduate Studies For Statistical Research, Cairo University
04.2001 -