While at Rutgers University, one of Dr. Johnson's first roles within the policy realm was as a Public Policy Intern and Peer Health Educator at the Hyacinth AIDS Foundation. Continuing advocacy work in the New Jersey area, in 2016, Dr. Johnson transitioned to working in public health while working with the NAACP; Dr. Johnson also took a position with Bioclinica as a Project Management Support Specialist with Oncology Medical Imaging.

In 2018, while attending the University of Michigan, Dr. Johnson became a Project Manager at the School of Environment and Sustainability within the Sustainability Without Border program. In this position, Dr. Johnson conducted usability testing, social life cycle assessment, stakeholder analysis, and built other technical skills. Within this period, Dr. Johnson also worked as a program assistant at The Ginsberg Center for Community Service and Learning, where she worked on co-developing a DEI framework and curriculum that would hopefully increase community-engaged projects for faculty and students.

In 2021, Dr. Johnson took a position with the Broad Institute of the Massachusetts Institute of Technology and Harvard as an Outbreak Science Consultant under Dr. Pardis Sabeti. Dr. Johnson continued her work as an Outbreak Science Consultant at Complexly Crash Course, an innovative media company. Moving into a full-time position, Dr. Johnson, in 2021, became an Epidemiologist at Emory University with the Rollins COVID-19 Epidemiology Fellowship Program. In this position, Dr. Johnson worked in government stakeholder engagement and developed standard operating procedures for COVID-19 investigations. Dr. Johnson continued in this position for 2 years.

While attending the University of Michigan, Dr. Johnson held two roles: a Sociological Research Methods Graduate Student Instructor and a Graduate Researcher. As a Graduate Researcher, Dr. Johnson focused on social inequality, culture and cognition, and race and ethnicity. Dr. Johnson worked in this position for 7 years. Currently, Dr. Johnson holds a role at the Morehouse National Center for Primary Care, where she is an Associate Project Director of Policy in the Atlanta Metropolitan area. Dr. Johnson conducted epidemiological studies at this institution and led a $3 million funded initiative focused on 'enhancing mental health policies and practices of Black youth.' Dr. Johnson has received numerous awards, including the 2016 Elizabeth Hallowell Award for Outstanding Work on Women's Rights, the Henry Rutgers Scholar Award, and the Rackham Merit Fellowship.

Reflecting on career highlights, Dr. Johnson highlights a collaborative project she led in Uganda with Sustainability Without Borders. Over two years with the project, Dr. Johnson worked with communities to understand the impacts of water filtration devices, which provided valuable research and resulted in strong relationships with people in the local community. Additionally, she discusses conducting focus groups at Emory University, where the data she helped collect led to significant improvements in opioid overdose prevention strategies at the national level. This work involved making strategies and approaches more tailored to community needs. Dr. Johnson also cites her involvement with the National Science Policy Network's Scholars-in-Residence Fellowship as a career highlight, as it allowed her to explore the intersection of science and policy, something she continues to advance in her current role. Lastly, Dr. Johnson highlights launching her own consulting business, Asé Analytics, as both a career highlight and a personal accomplishment.