Dear [Supervisor/HR Manager], I hope this letter finds you well. I am writing to bring to your attention a concerning situation regarding a co-worker at our Nassau, New York office. I believe it is imperative that immediate action is taken to address this matter. Firstly, I would like to provide a detailed account of the incident. On [date], while working on a project together, I experienced repeated instances of unprofessional behavior from my colleague, [Co-worker's Name]. This behavior has negatively impacted my ability to perform my job effectively and has created a hostile working environment. To provide further context, let me outline the specific incidents that occurred. On multiple occasions, [Co-worker's Name] has exhibited disrespectful behavior by consistently interrupting me during meetings, disregarding my suggestions and ideas, and deliberately taking credit for my work. Additionally, they have made derogatory comments and engaged in belittling remarks towards me, both privately and in front of other colleagues. These actions have not only affected my overall productivity but have also caused significant emotional distress. It is essential to note that I have tried to address this matter directly with [Co-worker's Name] through open communication and professional discussions. However, despite my efforts, the situation has not improved. Thus, I feel compelled to bring this issue to your attention in the hopes of reaching a resolution. As an employee, I strongly believe in maintaining a positive and collaborative work environment where every individual is respected and valued for their contributions. The current circumstances have compromised my ability to work effectively and have caused undue stress and anxiety. It has also impacted my overall job satisfaction, which ultimately affects the quality of my work. In light of these concerns, I kindly request that a thorough investigation be conducted into this matter. I would appreciate confidentiality throughout this process to ensure a fair and unbiased assessment. Additionally, I suggest arranging mediation or conflict resolution sessions between [Co-worker's Name] and me to find a resolution that benefits both parties. Proper documentation and follow-up actions should be implemented to monitor the progress and ensure a positive work environment moving forward. I firmly believe that resolving this issue promptly will contribute to a healthier work environment and foster a culture of respect and professionalism within our Nassau, New York office. I trust that you will handle this complaint with the utmost attention and urgency it deserves. Thank you for your understanding and prompt action in this matter. Should you require any additional information or have any questions, please do not hesitate to reach out to me. Sincerely, [Your Name] [Employee ID/Department] [Contact Information]