This series documents Freund's academic life, as an undergraduate at Haverford College and a graduate student at Oxford College. It also includes professional academic work: teaching at Haverford College, work as acting dean at Hunter College and Yale, and as an academic consultant for several other collegiate institutions.

This series, split into two sections, documents Freund's work as the president of the firm Private Funding Associates. The first section, arranged chronologically, depicts administrative files of the firm, including proposals, research, advertising, and formal correspondence. The second section, arranged alphabetically, includes all of the firm's Projects and Collaborations with corporations, foundations, and philanthropic institutions. These files contain proposals, correspondence, research, and general information.

This series, arranged chronologically, documents Freund's work as the Associate Director at the Rockefeller Foundation. Files include correspondence, research, and philanthropic consultations. This series is especially strong in documenting Freund's work as the director of the Warren Weaver Fellows Program, with files that range from 1988 to 1993.

This series demonstrates the work Freund completed on behalf of the Harlem Educational Activities Fund, abbr. HEAF. The series consists of four categories: Administrative Files, Financial Records, Programs, and Mott Hall. The administrative and financial files, arranged chronologically, document the staff, board meetings, correspondence, press, and general information of the organization. The Programs section, arranged alphabetically by organization, documents the programs that were instituted and maintained by the fund. Lastly, the Mott Hall section, arranged chronologically, details the specific programs and records at Mott Hall High School.

This series documents Freund's work as the Vice President of the John D. and Catherine T. MacArthur Foundation, as well as the Director of the MacArthur Prize Fellows Program. The files, arranged chronologically, detail meeting notes, correspondence, and proposals for the foundation. It also includes selection committee notes, correspondence, and reports for the Prize Fellows Program.

This series documents Freund's work at the Whiting Foundation, as well as his role as the Director of the Whiting Writers' Awards. The Administrative Files and Whiting Writers' Awards Program Files, arranged chronologically, include correspondence, and information about nominees, nominators, panels, board meetings, and winners of the award. The Foundation Files, arranged alphabetically by organization, document collaboration with other philanthropic projects.

The Woodstock Country School series documents Freund's attendance of the school, his participation on the Board of Trustees, work with the Woodstock Country School Foundation, as well as his role and involvement regarding the Woodstock Country School History Manuscript project. The series, organized chronologically, includes class notebooks, alumni directories, correspondence, foundation files, and drafts of the WCS History Manuscript.

This series, arranged alphabetically by subject and by year, includes Freund's personal and professional correspondence spanning the years 1973 to 1996.

This series documents Freund's work for several different organizations, both for corporate entities and pro bono cases. It also contains files that document his membership to several organizations, such as the Institute of Current World Affairs Council and the LOTOS Club.

This series depicts Freund's academic interests in both German history and American philanthropy. It is comprised of the research, drafts, bound copies and correspondence relating to Freund's three published books.

This series comprises twenty-three (23) boxes of material which is yet to be processed.