No.
F3 Fellows may not accept any additional funding (e.g., assistantships, fellowships, internships, employment, etc.) during the fellowship tenure. However, departments may choose to supplement stipend funds to match those received by other graduate students in the department. For example, if the current departmental graduate assistantship monthly stipend rate is greater than $2500, a department may supplement the additional monthly cost to match the rate of other graduate students in the department.
Primary intents of the program are for the Fellow to focus on completing their dissertation, participate in professional development events, and prepare application materials for next-stage academic positions (e.g., postdoctoral positions, tenure-track faculty positions).