Senior · Agile · International · Own platform

Boutique cybersecurity consultancy

Compliance, technical security and security governance, with the experience of a large consultancy and the closeness of a small team.

ISO 27001ENSNIS2TISAXPentestMicrosoftAgentic AI

Who we protect

Three types of organisation, three different starting points. A way of working designed for each one.

Public sector
Meet ENS and NIS2 without an in-house security team
SMBs
Get ISO 27001 certified in less than a month
Enterprise
NIS2, TISAX, Microsoft and AI with senior specialists

Most requested services

Who we are: two pieces, one goal

D4Security
The consultancy

Senior people who assess, implement, audit and stay alongside you. Standards, method and judgement.

SECURITY
The platform

The software where the work lives: controls, evidence, risks and tasks. What D4 builds, E4 maintains.

The name is no accident: d4 and e4 are two of the most strategic squares on the chessboard. Whoever holds them controls the centre and sets the pace of the game. That is how we see security: anticipate, and take the key positions before the adversary does.

Who is behind it

Claudio Carmona, founder of D4Security
Claudio Carmona
Founder of D4Security

Telecommunications engineer from UPC, with a master’s degree between UAB and TU Wien. He started out as a systems administrator, moved into cybersecurity consulting at KPMG and then sat on the other side of the table: four years running the cybersecurity services of an international industrial group.

That is where he realised something: information security only works when it is done with rigour and genuine commitment. Not the project that is delivered and forgotten, nor the compliance that expires the following year. In 2025 he founded D4Security to work that way: projects led in person, our own platform that keeps them alive, and artificial intelligence applied to every service.

Today D4Security works with organisations in Spain and with international groups, with projects in several European countries.

Hernán Lizondo
Hernán Lizondo
Head of Strategy & Business Development

An ESADE graduate, he co-founded his own technology consultancy and ran it as CEO for six years; it is now part of an international group. He knows first-hand what it takes to build a company and make it grow.

Experience has taught him that technology only adds value when it serves the client, with commitment and continuity. That is why he has been on board since D4Security was founded in 2025: so that every project is run with a business mindset and does not end on delivery day.

Today he brings that perspective to the growth of D4Security, which works with organisations in Spain and with international groups, on projects in several European countries.

Eduard Gatius
Eduard Gatius
Senior Cybersecurity Consultant

Telecommunications Systems Engineer from UPC, with more than seven years of experience in information security at leading firms such as KPMG, and a track record on international projects.

He shares D4Security’s core belief: security only works when it is done with rigour and genuine commitment, and kept alive long after the project is delivered.

He has been part of D4Security since it was founded in 2025.

What our clients say

We never felt we were working with an external consultant. He became part of the team, sharing our challenges and our commitment to doing things well. I would recommend him without hesitation to any organisation looking for a knowledgeable, reliable and truly committed information security consultant.
Eric Verdaguer
CEO and co-founder, LogMeal · ISO/IEC 27001:2022 certification
At MSI we have experts in information security and ISO, but D4Security has helped us take it to another level. That is exactly the value of a good partner: not filling a gap, but raising what you already do. Seeing how they work, how they respond and how they look after the client, I have no doubt they will do very well.
Salvador Bohigas
CEO, MSI Digital Builders
Result
Rubix Iberia achieves TISAX® certification

Assessment preparation across its three sites: Galdakao, Rubí and Terrassa (SMA). The information security benchmark in the automotive industry, achieved with D4Security.

Rubix Group · Automotive and industry

Organisations that have worked with us

Rubix
Schneider Electric
ALDI
LogMeal
Altair
MSI Digital Builders

Technology alliances

Microsoft
Bitdefender
SonicWall
Trend Micro
Lumu
Altospam

Let's talk

info@d4security.es · +34 696 14 50 69

Write to us