One company. Built one step at a time.

Forty years in IT, from South Africa to the UK.

The story

It started in South Africa.

Dimitrios Zacharopoulos was born in South Africa and raised in Greece, where his family is from. As a teenager he went back to South Africa, and that is where his working life in IT began. Alongside it, he has been behind a camera since childhood.

Years of hands-on work followed: networks, programming, consulting, development, and project and programme management, with real systems and real clients. Then came the move to the UK, and a new chapter.

Artificial intelligence came into the story in 2012, the year AlexNet won the ImageNet competition with deep neural networks and big data, and the modern deep learning revolution began. In 2018, when BERT changed how machines handle language, AI became a serious focus, and the divisions that make up Obipixel began to take shape.

Everything on this site grew from that one working life, one division at a time, with the writing alongside it the whole way. Obipixel Ltd is where it all comes together.

How it grew

Four parts. One company.

First

Obisec

After moving to the UK, Dimitrios was introduced to EC-Council certifications and began delivering their training. Obisec was conceived from that work in 2007: penetration testing, digital forensics, training and speaking, and security app development.

Visit Obisec ›

Then

Academy

Courses built around the same topics, for his own teaching and then for everyone. Six certified programmes on one pathway, from Python to AI strategy.

Visit the Academy ›

Alongside

Studio

A media studio for photography and videography, with cinematography coming soon. It turned a lifelong craft into a division, with workshops and camera apps for photographers.

Visit the Studio ›

Throughout

Books

Dimitrios has written stories since he was a teenager. The ObiWish children’s books came first, then the Dragons of Aetheria teen trilogy. The OBISEC trilogy was written over many years and held back until this year, because it felt ahead of its time.

See the books ›

In 2018 the company became Obipixel Ltd, one home for all four, keeping the Obisec, obi.academy and Alpha Studio names and domains.

Credentials

Certified, and still hands-on.

Six times

Instructor of the Year

EC-Council Circle of Excellence: 2009, 2010, 2015, 2021, 2023 and 2025.

EC-Council certified

Ethical hacker, forensics investigator, incident handler and ethical instructor.

40 years in IT

Networking, development, consulting, and project and programme management.

Lean by design

You work directly with the person doing the job. For larger projects we bring in trusted peers who share our standards.

Work with us ›

Get in touch.

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