She specialises in the study of diet and migration via tooth enamel biomineralization and isotope analysis.
Her thesis was the first application of radiogenic lead and strontium isotope analysis to human remains from archaeological sites in Britain, in order to investigate diet and mobility.
Montgomery collaborates with Jane Evans to undertake the environmental mapping of biosphere strontium in Britain.
[1] In 2010, Montgomery won the Society for Medieval Archaeology's Martyn Jope Award for "the best novel interpretation, application of analytical method or presentation of new findings" published in that year's volume of Medieval Archaeology along with co-authors Christopher Knüsel, Catherine M. Batt, Gordon Cook, Carol Palmer, Gundula Müldner, Alan R. Ogden, Ben Stern, John Todd, and Andrew S Wilson.
[4][5] She is a member of the Academic Awards Committee of the Executive of the British Federation of Women Graduates.