{"id":4215870,"url":"https://alion.io/job/millennium-management-reference-data-operations-specialist","title":"Reference Data Operations Specialist","company":{"id":704283,"name":"Millennium Management","domain":"mlp.com","url":"https://alion.io/company/millennium-management","size_band":"1001-5000","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Eightfold","truth_index":{"grade":"B","score":84,"open_postings":58,"ghost_share":0,"stale_share":0.431,"repost_share":0,"time_to_fill_p50_days":90,"computed_at":"2026-11-12T10:38:37Z"}},"role":"Data Science","role_family":"Data Science","seniority":"senior","employment_type":null,"work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Miami, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":null,"experience_years_min":5,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Microsoft Excel","optional":false},{"name":"SQL","optional":false}],"status":"live","first_seen_at":"2026-11-12T00:00:00Z","employer_posted_date":"2026-11-13","last_verified_at":"2026-11-13T02:43:16Z","board_verified":true,"closed_at":null,"days_open":1,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":1},"description":"Reference Data Operations SpecialistAbout Millennium\nMillennium is a global, diversified alternative investment firm, founded in 1989. Defined by evolution, innovation and focus, Millennium’s mission is to deliver results for our investors.\nOur people are empowered with both independence and support: the autonomy to pursue ideas with conviction and the backing of a global network committed to collaboration, disciplined risk management and continuous learning. With opportunities to deepen expertise and accelerate development, talent at Millennium is equipped to adapt, evolve and build lasting impact over time. Discover how transformative growth accelerates impact.\nMeet the Team\nOperations & Middle Office is one of the largest groups at Millennium. The Data Operations team sits within the Control function and oversees the firm’s Global Security Master through a range of data quality measures. The team also manages the processes that onboard new securities and attributes.\nWhat You’ll Do\nEnsure the accurate creation and maintenance of all tradable securities in Millennium’s Global Security Master\nOversee data quality control checks through system and business validations\nMonitor corporate actions and market data events to proactively ensure processing and avoid disruptions to downstream interfaces\nLiaise with internal front, middle, and back office clients and external data vendors to resolve ad hoc issues\nPartner with Development on requirements and help design and implement new processes and workflows that improve the Security Master for firm stakeholders\nWhat You Bring\n5-7+ years of experience in financial services, ideally in operations at a broker-dealer or asset management firm, with some experience in Security Master or reference data\nStrong knowledge of financial instruments, including equities, fixed income, and derivatives\nExperience working with Bloomberg, Refinitiv, Markit (S&P Global), ICE, and other data vendors\nAbility to implement and maintain new systems, procedures, and controls\nSolid understanding of basic SQL queries and proficiency in Microsoft Excel\nStrong communication and interpersonal skills, with experience supporting senior stakeholders\nAbility to meet deadlines and work well in a team environment\nSelf-directed, diligent problem solver with a desire to contribute to Millennium’s reputation and success","description_format":"text","description_chars":2365,"description_truncated":false,"requirements":{"experience_years_min":5,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[]},"benefits":["Continuous learning"],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["Hedge Funds & Alternative 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