Miller was an expert on institutional budgetary finance. He served on the faculty of the Maxwell School of Citizenship and Public Affairs, Syracuse University (1947-1969), as deputy director of the New York State Division of the Budget (1971-1978), and director of the budget, (1978-1980).
The Leo W. O' Brien Papers document O'Brien's service in the House of Representative where he served from 1952-1966 on behalf of Albany, NY. The collection includes subject files, correspondence and various communications materials from his Congressional tenure.