Sayyara Mammadova is a research associate at the Atlantic Council’s Digital Forensic Research Lab (DFRLab) and the pedagogical lead for its internationally recognized Digital Sherlocks training program. Mammadova specializes in disinformation, fact-checking, and open-source intelligence (OSINT), investigating malign influence operations and disinformation campaigns online. She also trains others in open-source investigative techniques and tools to combat disinformation and regularly delivers talks on disinformation and digital investigative methods.

In addition to her research, Mammadova actively contributes to the global fact-checking community. She assesses fact-checking organizations through the International Fact-Checking Network (IFCN) at Poynter and the European Fact-Checking Standards Network (EFCSN), promoting high standards within the fact-checking ecosystem. She also led the development of TG Collector (TGC), an open-source project that facilitates Telegram-based investigations for researchers.