Lundberg is a licensed psychologist and holds a PhD in Cultural and Community Psychology from the University of Oslo, Norway. Their research areas include gender, sexuality, and identity, with a particular focus on LGBTQI+ issues and norm critique. As a lecturer in psychology specializing in qualitative methodology, they primarily teach qualitative research methods.

Together with colleagues from Linköping and Örebro, Lundberg leads a national research network called Queer Psychology in Sweden (QueerPsy). QueerPsy is currently conducting several research projects on the experiences and well-being of LGBTQ+ individuals, funded by Forte and AFA Insurance.

Lundberg is also part of the international SENS project, which focuses on lived experiences and interactions with healthcare among people with variations in sex characteristics (commonly referred to as intersex variations or DSD).

As part of the SNAP network, Lundberg leads a two-year project studying sexual satisfaction in Sweden and Spain, partly funded by the Crafoord Foundation.

Additionally, Lundberg is involved in various other research projects, focusing on topics such as post-COVID experiences and gambling addiction.