Mr. Tumin has served widely in the public, private, and nonprofit sectors. He began his service as a policy analyst in Boston’s Office of Management and Budget, then as a private consultant on matters of crime and policing to public chief executives for the Massachusetts Bay Transportation Authority, the Boston Housing Authority, the Boston Police Department. Mr. Tumin later served as Special Assistant and chief policy analyst to District Attorney Elizabeth Holtzman of New York, and continued with her upon her election as Comptroller of the City of New York. Later, Mr. Tumin served as a contractor to Anderson Consulting, and continued as a member of the firm of Princeton Consultants, where he provided leadership on engagements in the financial services sector.