Reference Data Operations Specialist

CompanyMillennium

LocationLondon, England, United Kingdom

Posted At12/19/2025

UK Visa Sponsorship Analytics

Analytics are greyed out due to low classification confidence (35.0%).

Occupation Type

IT operations technicians

Occupation Code Skill LevelMedium Skilled

Sponsorship Salary Threshold

£41,700 (£21.38 per hour)

Standard minimum applies

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Description

Reference Data Operations Specialist

General Information

Hiring Department/Group: Operations & Middle Office
Job Title: Reference Data Operations Specialist
Office Location: London

The Operations and Middle Office department is one of the largest groups at Millennium. The Data Operation team resides within the Control function of Ops & MO and is responsible for overseeing the firm’s Global Security Master through various data quality measures. The team is also responsible for managing processes to onboard new securities and attributes.

We are seeking a driven and thorough Reference Data Operations Specialist to join our team. Ideally, you will be a self-starter with close attention to detail and a strong background in financial services industry - specifically in Security Master and Reference Data. If you are motived by taking the initiative to improve processes, operating efficient BAU activities, and real time problem solving, we would love to hear from you!

Principal Responsibilities

Ensuring accurate creation and maintenance of all tradable securities in Millennium’s Global Security Master

Oversee the completion of Data Quality control checks via system and business validations

Monitor Corporate Actions and Market Data events to proactively ensure processing and avoid disruptions to downstream interfaces

Liaise and resolve ad hoc issues raised from internal front, middle and back office clients as well as external data vendors

Analyze datasets, work with Development on requirements, assist in design and implementation of new processes, and workflows to improve Security Master for firm stakeholders

Manage team in EMEA and APAC plus collaborate globally with team members and leads

Serve as an escalation point and be well versed in stakeholder management across Trading, Risk and Ops counterparts

Qualifications/Skills Required

8+ years of experience in financial services, ideally in operations at a broker-dealer or asset management firm with experience in Security Master/Reference Data
Experience leading a small team and collaborating across different regions and time zones
Strong knowledge of financial instruments including equities, fixed income and derivatives
Experience working with Bloomberg, Refinitiv, Markit (S & P Global), ICE and other Data Vendors

Ability to implement and maintain new systems, procedures, and controls

Analytical skills for review and validation of datasets to identify gaps and drive new requirements

Solid understanding of basic SQL queries, proficient MS Excel

Strong communication and interpersonal skills, with experience supporting senior stakeholders

Must be able to meet deadlines and work well with a team environment

Self-directed, diligent problem solver with a desire to contribute to Millennium’s reputation and success