"Lift up, not kick down!"

We are convinced that learnings and experiences should be shared liberally, if not freely. It is our responsibility to help others do their jobs effectively, by helping them "climb the ladder". Instead of gatekeeping positions in IT, instead of diminishing the achievements of others, we believe that success should be celebrated and that we should strive to bring "newbies" up to our own level.


Tess teaches the CompTIA Linux+ curriculum at ITVitae, an ANBI-accredited school for young adults on the autistic spectrum. The Cyber Security students are provided with a 16-day course, including theoretical lessons, demonstrations, lab assignments and homework.

She also teaches in-house classes at her clients, mostly focusing on smaller security-related topics. Most recenty, she's been teaching classes on PKI fundamentals, certificate automation and threat modelling.

Tess is authorised trainer for:

  • CompTIA Security+, Server+, Linux+, CySa+, Pentest+, CASP+
  • CertNexus CFR-410, CSC-210

DevSecOps trainings

Unixerius now offers DevSecOps trainings! Better yet, we offer it in Dutch and in English, both remote and in-house or even at our own training location in Almere. More information here, in English.

Unixerius biedt sinds 2022 een DevSecOps introductie-cursus! Gewoon in de Nederlandse taal en het kan zowel remote als in-house of op locatie in Almere plaatsvinden. Hier meer informatie, in het Nederlands.


Trainings can be provided at the MAC3Park meeting facilities. A map is provided on the contact information page.


While we don't have an open mentoring program at this moment, Tess has coached interns at a number of our clients. Tess also frequently offers guidance and help on the Certification Station Discord and the /r/CompTIA Discord.

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