About a-team Marketing Services
The knowledge platform for the financial technology industry
The knowledge platform for the financial technology industry

A-Team Insight Blogs

John Randles Takes the Lead at Siren

Subscribe to our newsletter

After leaving the post of CEO at Bloomberg PolarLake in August 2017, John Randles has emerged as CEO of Siren, a Dublin-based start-up dedicated to the development of a data intelligence platform that combines search, business intelligence, graphic and knowledge representation to advance how financial services firms, among others, address complex questions.

The company’s platform is based on semantic technologies and is designed to provide a unifying layer on top of big data infrastructure tools, such as Hadoop and Solr, and deliver search, semantic drill down, global joins and advanced graphing capabilities. Financial use cases include fraud detection, risk management, opportunity discovery and Know Your Customer (KYC).

Siren was founded in 2011 as a spin-off of the Data Intensive Infrastructure research group at the National University of Ireland Galway (NUIG). Search engine research at the university created the first generation Semantic Information Retrieval Engine (SIREn) and other techniques to index, understand and reuse 30 billion knowledge graphs created by crawling the ‘web of data’.

Siren is Randles’ third start-up having previously set up Eontec and PolarLake. Eontec was acquired by Siebel Systems, which was acquired by Oracle, and became the core of the Oracle financial services offer. PolarLake was acquired by Bloomberg and became the heart of the company’s data management utility. Siren, says Randles, has the potential to be ‘the biggest by far’.

Subscribe to our newsletter

Related content

WEBINAR

Recorded Webinar: Measuring results from client onboarding solutions

Getting client onboarding right is critical to retaining customers, winning new business and avoiding regulatory penalties, but are banks getting it right? And how can they judge their performance and solve problems on a rolling basis? Answering these questions, the webinar will discuss how banks can measure results from client onboarding solutions, what they should...

BLOG

AI Everywhere at A-Team Group’s RegTech Summit (NYC) 2025

Artificial intelligence was the recurring theme this year’s A-Team Group RegTech Summit in New York. Across conversations on AI governance, agentic workflows, crypto compliance, surveillance, AML transformation and regulatory reporting, a single theme cut through: AI is becoming embedded in the regulatory fabric of financial services, but its adoption must remain grounded, explainable, and anchored...

EVENT

AI in Capital Markets Summit London

Now in its 3rd year, the AI in Capital Markets Summit returns with a focus on the practicalities of onboarding AI enterprise wide for business value creation. Whilst AI offers huge potential to revolutionise capital markets operations many are struggling to move beyond pilot phase to generate substantial value from AI.

GUIDE

Risk & Compliance

The current financial climate has meant that risk management and compliance requirements are never far from the minds of the boards of financial institutions. In order to meet the slew of regulations on the horizon, firms are being compelled to invest in their systems in order to cope with the new requirements. Data management is...