You can visit my LinkedIn page too.
For freelance services, check here.
./work_experience
DevOps/Support Engineer – Pressidium
- Monitor and maintain infrastructure
- Handle zero-escalation support tickets
- Develop automation tools using Ansible
DevOps Engineer – Hellenic Army
- Infrastructure and deployment automation using Ansible and Packer
- High-availability TCP architecture setup (HAProxy, Nginx).
- Improve and optimize developer operations using various tools (e.g. Vagrant)
- Compliance and documentation with ISO 27001:2013
Internet Operations Supervisor – Galanis Sports Data
- Oversaw and coordinated real-time nationwide operation teams
- Development of data processing software utilities using Java and bash
- Operate and administer “superleaguegreece.net”
- Verify statistical data from various vendors
- Create tools for character generator engines
- Cooperate with most Greek major channels (ERT, Mega TV, Star TV, Epsilon TV)
Network/VoIP Engineer – Soldecom LTD
- Maintain, troubleshoot and develop an Asterisk-based VoIP infrastructure
- Provide tier-2 support
- Create software utilities in bash
- Technical writing, including documentation and company blog articles
- Contractor for the largest NYSE listed independent crude oil tanker company in the world (EuroNAV/Gaslog).
./skills
- Problem Solving
I am determined and resourceful, and have the required knowledge to exploit it. Whatever I don’t know I usually Google or RTFM.
- Systems Thinking
Experience with complex infrastructures and various providers. I have created, modified, maintained, migrated from or to, and troubleshooted highly sophisticated systems, including web, VoIP and cloud infrastructure.
- Collaboration
Either in person or via Slack, Mattermost or other collaboration tools, I enjoy working with similar-minded professionals to achieve our goals (usually, mine is avoiding downtime). I believe in the doctrine that, once a problem is solved, it doesn’t need re-solving ever again. Therefore, I am an avid supporter of documenting processes and solutions to various issues. - Leadership
I have led small, agile operational teams, and worked under limited or no supervision. - Perform well under pressure
Working in operations has it’s caveats, and this usually is lack of time for certain operations. I have worked at the Operations field at several levels throughout the years, and have handled numerous time-critical tasks, ranging from displaying TV CGI on-time, to minimizing downtime by performing rapid recovery actions, to quickly having to deal with DDoS attacks. - Communication with Clients
Having supported users at all levels of sophistication and knowledge, ranging from ship personnel to enterprise executives to developers, I have learned that precise communication and clarification can solve many problems, even before they begin.
./troubleshooting_tools
- strace
- ps_mem
- tcpdump
- top/htop
- iotop
- mtr
- netstat
- nmap
- various bash oneliners and custom scripts
./devops_tools
- Ansible
- Git/Gitlab
- Nagios, Icinga, Grafana, netdata
- Terraform
- Vagrant, oVirt
- Packer
- Vault
- HAProxy
Currently working on caching with Varnish.
./OS
I have worked professionally with RHEL, Debian and Ubuntu, but I’ll find my way around any Linux system. At home, my main workstation is Debian Testing.
./education
Doctor of Business Administration
Thesis: TBA
Strathclyde University, Glasgow
MSc Computer Security and Resilience
Dissertation: Vulnerability Analysis for Power Grid SCADA Systems
Newcastle University, Newcastle upon Tyne
BSc Information Technology – Networking Technologies
Capstone Project: Smart City IoT Wireless Communication Infrastructure – IEEE 802.15.4 (Zigbee)
The American College of Greece – Deree College, Athens
BSc Information Technology
Dissertation: Automating Service-based Node Hardening