In March 2017 she served as the U.S. Department of State 's representative to Cambodia for several STEM-focused events including being an invited keynote speaker at the Cambodia Science and Engineering Festival and the US Embassy, as well as at several universities, K-12 schools and a science museum in Cambodia. She received A 2016 American Geophysical Union Excellence in Geophysical Education Award, a 2016 American Geophysical Union Ambassador Award, and was Conferred as an American Geophysical Union Fellow in 2016. In the February 2018 issue of Essence Magazine, Johnson is recognized as one of "STEM'S New Guard" in an article highlighting "15 Women who are Paving the Way and Paying it Forward." In April 2016, Black Enterprise Magazine designated Johnson as one of the "10 Black Women Changing the World via Science and Technology". In 2018, Johnson gave the Ambrose Jearld Jr. lecture sponsored by the Woods Hole Diversity Initiative. In 2019, Johnson was honored by the National Society of Black Physicists.