Wallace has previously served in senior staff positions at The National Osteoporosis Foundation,[2] and Council for Responsible Nutrition.

[4][5] In 2011, Wallace was appointed senior director of scientific and regulatory affairs at the Council for Responsible Nutrition, succeeding Andrew Shao.

[7] In the same year, he also served as senior director of scientific and clinical programs at the National Bone Health Alliance, a public-private partnership operated by the NOF.

[8] Additionally, the Department of Nutrition and Food Studies at George Mason University hired Wallace as an adjunct professor.

[17] His other editorial board work includes serving as Editor-in-Chief of the Journal of Dietary Supplements[18] and as Nutrition Section Editor of the Annals of Medicine.