DevOps Manager

• Jan 2020 - Present

Senior devOps engineer

• Jan 2019 - Jan 2020

With identified needs including major improvements in stability, scalability, reliability, supportability and visibility, I joined a team charged with building a DevOps team tasked with enabling the development of “Trisus Claim Informatics”, a multifaceted SaaS offering targeted to U.S. healthcare providers, aiding with minimising cost to patients. I engaged with numerous scrum teams working on different areas of the product to establish a robust and purely PaaS architecture based on the offerings of Microsoft Azure’s cloud proposition. I designed the network component of the new architecture to boost security and optimise robustness and capacity. I was actively engaged in improving the security of the proposition by optimising the authentication mechanism of the customer-facing product utilising OIDC flows and a third party provider, Auth0 to enable Customer Federations. I was responsible for designing the DR/BC plan for Trisus. I was engaged with the identification and management of Cloud costs, delivering savings of more than £20k annually. As the DevOps engagement and team was evolving, I championed the transformation from scrum to Kanban methodology providing a 6-strong team with the ability to support a rapidly growing software engineering department. I also engaged in pre-sales, putting together responses for formal RFPs. As the product began its transformation to a platform that would support all Craneware’s offerings, I was tasked with establishing a cloud operations branch of the team utilising the SRE ideology and design an OnCall (out of hours) support scheme.Tools, frameworks, third-party APIs and languages used include: Ubuntu LTS, Windows Server 2016/2019, Python, Bash, Java, Powershell,ansible, Docker, Kafka, ELK stack, Syslog-ng, Prometheus, Grafana, Flink, Swagger / OpenAPI, Microsoft Azure DevOps Server, Microsoft Azure, PostgreSQL, SQL Server, site 24x7, Launch Darkly Show less

Senior DevOps Engineer

• Mar 2018 - Jan 2019

DevOps Engineer

• Jun 2015 - Jan 2019

I joined a 7-strong scrum team as a DevOps tasked to improve the operations of “Enterprise Ticketing”, a SaaS offering presented as a RESTful API to airlines, cinemas and other customers, delivering mobile passes/tickets on their behalf to hundreds of thousands of their customers daily. I set out on a journey of establishing a DevOps practice and drive the team to enterprise-grade maturity. I worked to migrate the platform to a new Linux-based architecture, Infrastructure and configuration as code. Building on an already mature build pipeline based on GitLab / Jenkins, we delivered continuous delivery and one-click deployment capabilities leveraging tools such as Jenkins, Chef / Kitchen, Groovy and Nexus. The sum of the changes was in technologies and processes resulted in four-nines availability figures and consistent, world-class API response times. Monitoring and Analytics were delivered using tools such as Syslog-ng, Fluentd, OpenTSDB and Grafana for live predictive alerting and event correlation. Rundeck was introduced to standardise operations, allowing the support team to carry out operations that previously required specialist intervention. The new automated test batteries were delivered using Blazemeter Taurus and soon helped identify scaling bottlenecks and increase the platform’s scaling capacity by more than 300%.Tools, frameworks, third-party APIs and languages used include: CentOS/RHEL, Chef, Python, Bash, Java, Tomcat,Taurus, Jmeter, Docker, RabbitMQ, HiveMQ, ELK stack, Syslog-ng, Grafana, Fluentd, OpenTSDB, Hbase, Rundeck, Jenkins, Groovy, Git / GitLab, Swagger / OpenAPI, Vagrant, Packer, AWS EC2 / S3, Kubernetes, JIRA, PagerDuty, Twi-lio, SQL Server Show less

DataCenter Engineer

• May 2013 - May 2015

As a member of the Datacenter and WEB-TV/OTT services team, my primary objectives were to design, document and implement new products and services. Focused on network and systems security, my main responsibilities centered on the design and implementation of new security policies and tools, while I also undertook duties pertaining to training, supervising and advancing new staff members. As a member of the Datacenter and WEB-TV/OTT services team, my primary objectives were to design, document and implement new products and services. Focused on network and systems security, my main responsibilities centered on the design and implementation of new security policies and tools, while I also undertook duties pertaining to training, supervising and advancing new staff members.

Freelance IT Solution Provider

• Jan 1997 - May 2015

Freelance work as an IT Solution Provider running a small business providing IT services ranging from software development to server deployment and support as well as individual IT services like e-mails, web-based applications etc. Freelance work as an IT Solution Provider running a small business providing IT services ranging from software development to server deployment and support as well as individual IT services like e-mails, web-based applications etc.

Systems Engineer

• Nov 2008 - May 2013

My primary responsibility is to support the IT infrastructures of our clients, working with a wide mix of technologies and software solutions. On ship installation and support specialist. Presales engineer, solutions designer, delivering best value matching the client needs. engaged in promoting new ideas and solutions to clients as their needs evolve. Account Manager for Cisco Datacenter Solutions and Oracle Servers and storage. Implementation and Design Engineer for Fujitsu Servers and storage solutions Show less

Military Service

• Jan 2007 - Jan 2008

After completing basic training, positioned as the Staff Sergeant accountable for the logistics of fuel supply logistics for the Lesvos island area for four months. Assigned the job of Assistant Press Officer of the Public Office of the Chief of General Army Staff for five months. My responsibility was to manage International Public Relations, a task requiring daily interaction with high ranking officers and subsequently authoring press releases. After completing basic training, positioned as the Staff Sergeant accountable for the logistics of fuel supply logistics for the Lesvos island area for four months. Assigned the job of Assistant Press Officer of the Public Office of the Chief of General Army Staff for five months. My responsibility was to manage International Public Relations, a task requiring daily interaction with high ranking officers and subsequently authoring press releases.

Seminar Instructor

• Jun 2004 - May 2007

As a Seminar Instructor , delivered around 2,500 hours of Continuous Professional Development courses on the subjects of Linux, PHP and mySQL. Author of training manuals and procedures documentation. As a Seminar Instructor , delivered around 2,500 hours of Continuous Professional Development courses on the subjects of Linux, PHP and mySQL. Author of training manuals and procedures documentation.

Systems/Networks engineer and Administrator

• Nov 2001 - Apr 2007

Member of the Core Services and Servers group responsible for design, deployment and maintenance of; Server hardware, mostly Sun Microsystems SPARC servers running Solaris OS x86 servers running Linux, FreeBSD and Windows (with focus on system interoperability and integration) Network equipment, mostly CISCO and Juniper The University’s e-mail and directory service running x500 (ldap), Sendmail, Cyrus IMAP, Spam Assassin etc Appointed the role of Information Security and Information Assurance Officer (in 2003). I became responsible for defining and maintaining a formal network security and usage policy, auditing tools, procedures, policy enforcement tools and so on. The aim of this role was to create a RFC 2350 –compliant CSIRT team. Show less

Systems Engineer

• Jan 2003 - Jan 2006

Greek Schools Network (http://www.sch.gr) project Member of the Central Administration team of Greek Schools Network (http://www.sch.gr) project Design and implementation of backup procedures Design and implementation of Certification Authority (CA). Greek Schools Network (http://www.sch.gr) project Member of the Central Administration team of Greek Schools Network (http://www.sch.gr) project Design and implementation of backup procedures Design and implementation of Certification Authority (CA).

System Administrator

• Jan 2002 - Jan 2004

Greek Research & Technology Networks (GRNET SA / EU Research and Education Network). Greek Research & Technology Networks (GRNET SA / EU Research and Education Network).

System Administrator

• Jan 2000 - Jan 2001

at Networks Lab, responsible for the performance of the hardware and software utilised by the lab's research personnel, as for the support of the services offered to faculty, software/email network resources, from the laboratory. at Networks Lab, responsible for the performance of the hardware and software utilised by the lab's research personnel, as for the support of the services offered to faculty, software/email network resources, from the laboratory.

System Administrator

• Jan 1998 - Jan 2000