Kaj Siebert
AeroLeads people directory · profile

Kaj Siebert Email & Phone Number

Chief Information Officer at Social Finance
Location: London, England, United Kingdom 8 work roles 2 schools
1 work email found @socialfinance.org.uk 2 phones found area 207 LinkedIn matched
✓ Verified May 2026 4 data sources Profile completeness 100%

Contact Signals · 1 work email · 2 phones

Work email k****@socialfinance.org.uk
Direct phone ***-****
LinkedIn Profile matched
3 free lookups remaining · No credit card
Current company
Role
Chief Information Officer
Location
London, England, United Kingdom
Company size

Who is Kaj Siebert? Overview

A concise factual answer block for searchers comparing this professional profile.

Quick answer

Kaj Siebert is listed as Chief Information Officer at Social Finance, a company with 142 employees, based in London, England, United Kingdom. AeroLeads shows a work email signal at socialfinance.org.uk, phone signal with area code 207, and a matched LinkedIn profile for Kaj Siebert.

Kaj Siebert previously worked as Co Producer - Music Festival Programme at Cern and Chief Technology Officer, Digital Labs at Social Finance. Kaj Siebert holds Ph.D., Astrophysics from Ucl.

Company email context

Email format at Social Finance

This section adds company-level context without repeating Kaj Siebert's masked contact details.

{first}.{last}@socialfinance.org.uk
89% confidence

AeroLeads found 1 current-domain work email signal for Kaj Siebert. Compare company email patterns before reaching out.

Profile bio

About Kaj Siebert

Kaj Wik Siebert, PhD, is an experienced technology strategist with a strong background in astrophysics, fintech R&D, startup mentoring, machine learning, data science, and ethical uses of data. His diverse experience spans FTSE100s, startups, local charities, multi-national NGOs, and both local and central government, giving him a unique perspective on the interplay between technology and organizational operations.Kaj's work has included collaborating with UK government departments on the Homes for Ukraine project, involvement with the ITU's AI for Good programme & summit, and projects with the Gates Foundation, World Bank, and WHO. He has also served as an Industrial Supervisor for multi-disciplinary 'Impact' PhD studentships at University College London.His academic background includes a PhD in Astronomy from University College London, where he honed his expertise in quantum mechanics and data science. This unique blend of scientific knowledge, technological expertise, and commitment to social impact gives him a distinctive perspective on the future of transformative technologies. Kaj's ongoing work aims to harness the power of advanced technologies to address global challenges and drive positive societal change across various social sectors.

Listed skills include Agile Methodologies, Software Development, Xml, Distributed Systems, and 46 others.

Current workplace

Kaj Siebert's current company

Company context helps verify the profile and gives searchers a useful next step.

Social Finance
Social Finance
Chief Information Officer
London, GB
Employees
142
AeroLeads page
8 roles

Kaj Siebert work experience

A career timeline built from the work history available for this profile.

Co Producer - Music Festival Programme

Current

Meyrin, Genève, CH

As a co-producer with The Big Bang Collective, a collaboration between CERN and several universities, I play a key role in creating and delivering engaging science outreach programs at music festivals across Europe, including WOMAD (UK), Colours of Ostrava (Czech Republic), Smukfest (Denmark), and Rototom (Spain). My responsibilities include:* Developing.

Jan 2024 - Present

Chief Information Officer

London, GB

As Chief Information Officer at Social Finance, I was responsible for overseeing a wide range of critical technical and data-related functions. My key responsibilities included:* Managing and redesigning the organization's technical infrastructure, implementing new security frameworks and policies to ensure robust and secure systems* Overseeing data.

May 2019 - Mar 2024

Chief Technology Officer, Digital Labs

London, GB

As Chief Technology Officer at Social Finance, I spearheaded the development of complex data science projects across a diverse range of social impact areas. My key responsibilities included:* Leading the Social Finance Digital Labs, where we built a diverse team and pioneered innovative AI and data science solutions* Overseeing the design and.

Apr 2016 - Mar 2024

Founder & Cto

Justinvesting

As one of the five original founders of JustInvesting, I played a pivotal role in developing our SaaS solution, which provided pipeline, deal room, and investment lifecycle tools for a diverse clientele including professional and angel investors, investment networks, and larger enterprises. My key responsibilities included:* Leading product development.

Mar 2013 - Mar 2016

Cto

Hammersmith, London, GB

At Columba Systems, I spearheaded the development of a cutting-edge data platform that revolutionized the handling of high-performance data feeds and high-quality reference data. My key responsibilities and achievements included:* Designing and implementing a core platform featuring an event-based, multi-platform database wrapped in a document-based.

Mar 2003 - Apr 2013

Owner

Chi-Squared Ltd
May 2003 - Apr 2005

Technology Strategy Group

Toronto, ON, CA

After completing my PhD, I joined Reuters' internal R&D (innovation) group, where I played a crucial role in introducing and leveraging emerging technologies. My key responsibilities and achievements included:Creating proof-of-concepts and introducing cutting-edge technologies such as XML, Web Services, and mobile platforms to the business* Reporting.

Apr 1999 - Mar 2003
Team & coworkers

Colleagues at Social Finance

Other employees you can reach at socialfinance.org.uk. View company contacts for 142 employees →

2 education records

Kaj Siebert education

Ph.D., Astrophysics

Ucl

Bsc, Astrophysics

Ucl
FAQ

Frequently asked questions about Kaj Siebert

Quick answers generated from the profile data available on this page.

What company does Kaj Siebert work for?

Kaj Siebert works for Social Finance.

What is Kaj Siebert's role at Social Finance?

Kaj Siebert is listed as Chief Information Officer at Social Finance.

What is Kaj Siebert's email address?

AeroLeads has found 1 work email signal at @socialfinance.org.uk for Kaj Siebert at Social Finance.

What is Kaj Siebert's phone number?

AeroLeads has found 2 phone signal(s) with area code 207 for Kaj Siebert at Social Finance.

Where is Kaj Siebert based?

Kaj Siebert is based in London, England, United Kingdom while working with Social Finance.

What companies has Kaj Siebert worked for?

Kaj Siebert has worked for Social Finance, Cern, Justinvesting, Columba Systems Ltd, and Chi-Squared Ltd.

Who are Kaj Siebert's colleagues at Social Finance?

Kaj Siebert's colleagues at Social Finance include Michael Crowder, Martina Latimir-Jones, Meg Kelly, Bhavya Mehta, and Salma Riaz.

How can I contact Kaj Siebert?

You can use AeroLeads to view verified contact signals for Kaj Siebert at Social Finance, including work email, phone, and LinkedIn data when available.

What schools did Kaj Siebert attend?

Kaj Siebert holds Ph.D., Astrophysics from Ucl.

What skills is Kaj Siebert known for?

Kaj Siebert is listed with skills including Agile Methodologies, Software Development, Xml, Distributed Systems, System Architecture, Java, It Strategy, and Sql.

Find 750M verified contacts

Search by job title, company, industry, location, and seniority. Export verified B2B contact data when you need it.