Jobs Companies Threenitas S.A. Systems & Network Admin Trainee (IT)

About this Systems & Network Admin Trainee (IT) role at Threenitas S.A.

Threenitas S.A. · Onsite · Dafni, Dafni, Greece

We are looking for a Systems & Network Administrator Trainee to join our IT & Support team and gain hands-on experience across IT infrastructure, systems administration, networking, and client-facing application support.

You will support our internal IT environment while also contributing to the monitoring, troubleshooting, and operational support of digital platforms delivered to our clients.

Working alongside experienced IT, Support, and Development professionals, you will gain practical experience in incident management, application support, cloud technologies, troubleshooting, and service delivery in a real business environment.

We know that you will be a good fit for our team, if...

  • You have a genuine interest in IT Infrastructure, Systems Administration, Networking, Cloud Technologies, and Application Support.
  • You enjoy troubleshooting issues and finding practical solutions.
  • You are curious about how systems and digital applications operate in production environments.
  • You communicate clearly with both technical and non-technical stakeholders.
  • You are organized, detail-oriented, and comfortable managing multiple tasks.
  • You are eager to learn, take initiative, and develop your technical skills.
  • You enjoy collaborating with different teams and working in a dynamic technology environment.
  • You demonstrate responsibility, professionalism, and a positive attitude.

Main Responsibilities

  • Support the installation, configuration, maintenance, and monitoring of internal IT systems, networks, devices, and services.
  • Monitor customer-facing applications and assist with troubleshooting and operational support.
  • Receive, record, categorize, and track client incidents and service requests through the appropriate tools.
  • Communicate with clients to understand reported issues, gather information, and provide updates when required.
  • Investigate technical issues, perform initial troubleshooting, and escalate incidents to the appropriate IT, Support, or Development team.
  • Prioritize requests based on impact, urgency, and applicable SLAs.
  • Assist with application deployments, updates, configuration changes, and routine maintenance.
  • Support Active Directory, Microsoft 365, user accounts, access management, and IT assets.
  • Maintain accurate technical documentation and support records.
  • Assist with validating completed fixes and communicating resolutions to clients.
  • Contribute to monitoring, reporting, and continuous improvement of IT and support processes.

Requirements

We would like to talk to you, if you have...

  • You are currently studying or have recently graduated in Computer Science, Information Technology, Network Engineering, or a related field.
  • Basic understanding of computer networks, operating systems, and IT infrastructure.
  • Familiarity with Windows and Microsoft Office.
  • Basic knowledge of TCP/IP, DNS, DHCP, VPN, and network troubleshooting.
  • Basic understanding of web applications and production environments.
  • Strong analytical and problem-solving skills.
  • Good communication skills in Greek and English, both written and spoken.
  • A genuine willingness to learn, take initiative, and grow professionally.

We would greatly appreciate if you also have...

  • Basic knowledge of Active Directory and Microsoft 365.
  • Familiarity with virtualization or cloud platforms such as Azure or AWS.
  • Basic knowledge of web hosting, DNS, SSL certificates, or Cloudflare.
  • Basic knowledge of SQL or relational databases.
  • Familiarity with PowerShell, Bash, or Python.
  • Exposure to JIRA, Confluence, monitoring, logging, or incident management tools.
  • Previous academic, internship, or personal projects related to IT infrastructure, networking, systems administration, or application support.

Benefits

  • Hands-on experience across IT infrastructure and client-facing digital platforms.
  • Mentoring and guidance from experienced IT, Support, and Development professionals.
  • Exposure to networking, cloud, security, monitoring, and production support.
  • Experience with real-world troubleshooting, incident management, and client support.
  • Opportunity to develop both technical and communication skills.
  • Friendly, collaborative, and knowledge-sharing environment.
  • Potential opportunity for future employment upon successful completion of the internship.
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About Threenitas S.A.

Threenitas S.A. is a software engineering company based in Athens and Heraklion (Crete), Greece.

At Threenitas we work directly with our clients to plan, design, and implement digital products & solutions. Our strength lies in our ability to apply what we know and our eagerness to learn what we haven’t yet practiced. We love technology, gadgets and services, and we rejoice in putting them to the best of use for our client’s projects. We build on top of our deep knowledge of digital media and our solid engineering background, to realize our clients' vision and meet their practical goals.

We move across the digital divide boundary. Our technical expertise supplements our creative thinking, and acts as an amplifying factor, that supports successful delivery of our client's message. Our goal is to build projects that provide the ultimate digital experience for our audiences.

The Environment

All members of our team are professionals passionate with technology, who love exploring new products and services in order to stay on the cutting edge.

Any new team member should be interested in technology and demonstrate a keen interest in applying such technology as a means for improving people’s everyday lives. They will be encouraged to expand on ideas, play around with new technologies, develop themselves as professionals and develop fun applications that will be used by many.

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