Experience

VIRTUAL OPEN SYSTEMS
• France
• IT Services and IT Consulting
• 1 - 100 Employee
• R&D Systems Software Engineer

  • Sep 2020 - Present


CENSUS S.A.

• Poland
• Renewable Energy Semiconductor Manufacturing
• 1 - 100 Employee

• Embedded Systems Security Engineer

  • Jan 2020 - Sep 2020

  Performing source code auditing, protocol analysis and firmware dumping for embedded devices from various domains (medical, industrial, mobile). Performing source code auditing, protocol analysis and firmware dumping for embedded devices from various domains (medical, industrial, mobile).



ICCS - Institute of Communication and Computer Systems

• Software Engineer / Researcher

  • Jan 2017 - Jan 2020

  Working on the ACTiCLOUD EU Project. Co-delivered ACTiManager, a software layer written in Python, on top of virtualized platforms, which results in more efficient resource-utilization for cloud environments. Working on the ACTiCLOUD EU Project. Co-delivered ACTiManager, a software layer written in Python, on top of virtualized platforms, which results in more efficient resource-utilization for cloud environments.



Electrical and Computer Engineering, NTUA

• Greece
• Higher Education
• 1 - 100 Employee

• Graduate Teaching Assistant (Operating Systems)

  • 2011 - Jan 2020

  Senior (from 2014) Teaching Assistant for the "Operating Systems" course. Responsibilities and duties include: creating and updating lab's exercises, presenting lectures and exercises, explaining principles and answering questions at course's emailing list, preparing and scoring exams questions.

• Graduate Teaching Assistant (Operating Systems Laboratory)

  • 2011 - Jan 2020

  Senior (from 2014) Teaching Assistant for the "Operating Systems Laboratory" course, which is the advanced (kernel, device drivers and I/O virtualization development) Operating Systems course. Responsibilities and duties include: creating and updating lab's exercises, presenting lectures and exercises, explaining principles and answering questions at course's emailing list, preparing and scoring exams questions.



Computing Systems Laboratory (CSLab), NTUA

• Greece
• Research Services
• 1 - 100 Employee

• Researcher / Phd Candidate

  • 2011 - Jul 2019

  My research interests lie in the fields of Systems Virtualization, Accelerator Virtualization, Operating Systems, Computer Systems, High performance Interconnects, Computer Architecture for Clusters etc.For the purpose of my PhD thesis, I worked on accelerator virtualization techniques, exploring, designing and implementing system frameworks for GPUs and Intel Xeon Phi accelerators.More info can be found at my homepage: http://www.cslab.ece.ntua.gr/~sgerag

• Systems Engineer / Administrator

  • 2011 - Jul 2019

  Senior (from 2014) administrator responsible for developing, maintaining and supporting the lab infrastructure (~20 grad students, faculty members and visiting staff). Services include: mail, web, dns, dhcp, voip, dbms, storage, monitoring/alert mechanisms, auth and directory services. Additionally, research facilities include: a 32-node cluster, IB-connected nodes, NAS and FC-SAN storage, accelerator (GPU, Xeon Phi) equipped servers.



GRNET - Greek Research & Technology Network

• Greece
• IT Services and IT Consulting
• 100 - 200 Employee

• System Administrator

  • Oct 2011 - Jun 2012

  Worked as a system administrator on the infrastructure of StratusLab EU Project. Worked as a system administrator on the infrastructure of StratusLab EU Project.



Institute for the Management of Information Systems

• Greece
• Research Services
• 1 - 100 Employee

• Software Developer

  • May 2010 - Jul 2010

  Worked at IMIS (Institute for the Management of Information Systems) and extended the functionality of Hecataeus (http://web.imis.athena-innovation.gr/~gpapas/hecataeus.html), a what-if analysis tool for database schema evolution. Worked at IMIS (Institute for the Management of Information Systems) and extended the functionality of Hecataeus (http://web.imis.athena-innovation.gr/~gpapas/hecataeus.html), a what-if analysis tool for database schema evolution.



ALPHA Education (https://www.alpha-ekp.gr/)

• Computer Science Teaching Assistant

  • Oct 2009 - Jul 2010

  Giving seminars on Operating Systems, Databases, Programming Languages Giving seminars on Operating Systems, Databases, Programming Languages