Workplace bullying, affecting over 30% of employees in the U.S. and up to 50% in other countries, leads to severe consequences for individual well-being and organizational performance. This thesis delves into the intricate dynamics of how gender influences perceptions of workplace bullying, focusing on the roles of the perpetrator's gender, the victim's gender, and the observer's gender. Utilizing a mixed-methods approach, the study combines quantitative experimental design and qualitative thematic and sentiment analysis. The quantitative phase employs a 2x2 between-subjects experimental design with 177 participants randomly assigned to scenarios manipulating the gender of the senior colleague (either male or female). Participants' perceptions of severity, seriousness, intervention compulsion, and psychological safety impact were measured. The qualitative phase includes thematic and sentiment analysis of participants' open-ended responses to the scenarios. Results reveal that female perpetrators are perceived more harshly than male perpetrators, and female observers are more likely to recognize bullying behaviors and advocate for intervention. These findings underscore the significant role of gender stereotypes and societal expectations in shaping perceptions of workplace bullying, highlighting the need for gender-sensitive policies and interventions in organizational settings. Keywords: Workplace bullying, gender dynamics, perpetrator gender, victim gender, observer gender, mixed-methods, quantitative experimental design, qualitative thematic analysis, sentiment analysis.