Cillian Kieran

Profile

Cillian is a serial entrepreneur and seasoned privacy engineer with two decades of experience leading data-intensive businesses. As Founder & CEO of Ethyca, he combines deep technical expertise with a track record of building and scaling companies, including a global digital agency serving Fortune 500 clients. His career reflects a consistent focus on engineering data systems with ethical, user-centric principles—a foundation that positions him uniquely to lead in the privacy infrastructure space.

Highlights

Founder & CEO, Ethyca

Launched Ethyca to enable privacy-by-design infrastructure for developers. Leads product vision, engineering strategy, and company growth. Built a developer-first platform that automates compliance with privacy laws (GDPR, CCPA) and embeds ethical data practices into modern software stacks.

2018 - Present

Founder, BrandCommerce

Co-founded a retail tech startup bridging online and offline commerce experiences. Developed product strategy and go-to-market in a competitive, rapidly evolving sector.

2016 - 2018

Founder & CEO, CKSK

Built a full-service digital consultancy from the ground up, scaling it to 100+ employees with offices in Dublin, Amsterdam, New York, and Gdańsk. Led data and digital transformation initiatives for global clients including PepsiCo, Heineken, PlayStation, and Danone.

2006 - 2016

Role

Cillian brings the rare combination of visionary product instincts, deep technical grounding, and demonstrated leadership, making him a founder capable of building a category-defining company in data infrastructure.

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Articles by Cillian

Guides

Cookies in Digital Marketing

From Targeting to Compliance

May 28, 2026](/content/guides/cookies-in-digital-marketing/index.html)

Guides

Data Anonymization

A 2026 Guide for Privacy and Compliance

Apr 27, 2026](/content/guides/data-anonymization/index.html)

Team

Ethyca Welcomes Julie Brill and Daniel Weitzner to Our Board

Nov 20, 2025](/content/news/ethyca-welcomes-julie-brill-and-daniel-weitzner-to-our-board/index.html) .jpeg?rect=1055,0,2690,2690&w=320&h=320&fit=min&auto=format)

Company News

A technical foundation for trust

Solving the toughest problems in data privacy

Dec 05, 2024](/content/insights/a-technical-foundation-for-trust-solving-the-toughest-problems-in-data-privacy/index.html)

Insights

Fideslang:

An open ontology for data privacy and AI governance

Jan 09, 2024](/content/insights/fideslang-an-open-ontology-for-data-privacy-and-ai-governance/index.html)

Company News

Our CIP certified privacy professional mission patch

Sep 22, 2023](/content/insights/our-cip-certified-privacy-professional-mission-patch/index.html)