Marc Singer has spent most of his academic career working to improve educational options for nontraditional and adult learners. He has led programs and initiatives in the areas of online learning; integration of student services and mentoring into the curriculum; prior learning assessment, including portfolio development and assessment; credit-by-exam programs; and the review of training programs, licenses, and certifications for college-level equivalency. Marc has also led efforts in the areas of competency-based education and the effective utilization of open educational resources. He has created partnerships and consortia to streamline and scale processes, strengthen standards, and provide greater flexibility and access to adult students. Marc also served for seven years as director and chair of the National Institute on the Assessment of Adult Learning.

Marc was founding Dean of the School of Undergraduate Studies at Golden Gate University in San Francisco. Prior to that, he was Vice Provost, Center for the Assessment of Learning, at Thomas Edison State University in Trenton, NJ. Marc also led academic initiatives for the College Board's College-Level Examination Program and other assessment programs; at Educational Testing Service, he was an assessment specialist responsible for the Advanced Placement US History and Human Geography programs, and was a program director for the PSAT/ NMSQT program.

Marc taught history and humanities at institutions in New Jersey and North Carolina for 12 years, and worked as a consultant in history for various museums and television networks, including ESPN Classic.