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Siggy Seibold

PartnerNew York

Serves capital-markets clients at the intersection of technology, operations, and strategy

Siggy is a partner in our capital-markets sector with expertise in technology and operations. She has more than 25 years of experience working for major investment banks and hedge funds in the United States, Europe, and Asia.

Examples of Siggy’s experiences include the following:

  • leading the firm’s benchmarking for institutional clients onboarding and “know your customer,” and investment-banking operating models
  • guiding cloud strategy and transformation
  • helping a global wholesale financial-services institution identify an approximately ten percent run-rate savings of nondemand levers and redesigned its procurement process
  • operating-model work, which includes right-sourcing assessments and execution of defined in- or outsourced functions, including “know your customer,” application management, middle- and back-office activities, and execution of IT-organization transformation
  • helping five investment banks explore disruptive approaches to reference data management, which led to the establishment of a utility
  • leading end-to-end operations capability assessments to help implement uplift by leveraging automation and analytics technology
  • defining the global digital strategy of a major consulting firm for capital markets and laying the foundation for the blockchain practice, including significant investment in the distributed-ledger technology and fintech space
  • filing a patent that protected a mathematical workflow solution pertaining short-selling regulation in investment banking

Prior to joining McKinsey, Siggy was a partner at KPMG and Accenture. She started her professional career as banking apprentice, investment-banking trainee, and foreign-exchange trader at Deutsche Bank before working for a decade in IBM’s consulting division.

Siggy holds an MBA in finance from City University of Seattle, and executive education from the Wharton School, University of Pennsylvania.

Published work

Modernizing corporate-loan operations,” McKinsey & Company, January 2024

Winning corporate clients with great onboarding,” McKinsey & Company, October 2022

Five actions to build next-generation know-your-customer capabilities,” McKinsey & Company, October 2021

Past experience


Managing director, partner

Senior managing consultant

Deutsche Bank
Foreign exchange trader


City University
MBA, finance