I face the following problem:
- I have done my Bachelor thesis at an organisation (in 2019), where I had a contact point (CP) who supplied me the data, did some brainstorming with me and read the final thesis before submitting. The organisation asked to be anonymous and their name is not displayed in the thesis.
- In 2020, I found a conference workshop where my thesis was a potential match and asked my CP if the org would allow for the thesis to be reduced to meet word limits and be sent to this workshop. This was 3 weeks before the submission deadline and I offered him to be a co-author on the paper. He replied, that unfortunately even the data is anonymous and while it would be interesting, the org takes their anonymity seriously hence it can't be submitted.
- I found out that he (with 5 other authors, his name comes 3rd) submitted a paper to the same exact workshop, with a hugely overlapping topic to my thesis. The base data used in his paper is the same, although it has some additional features for modeling. The outcome variable is the same, the methods used are similar and even smaller details can be matched between the two works. My work is not cited, nor was I asked to be an author on his published workshop paper, however he was aware of my work. His e-mail address is on the paper, clearly revealing the organisation.
What should be my next steps now? I thought about e-mailing him first and asking him to explain this, but what else should I ask for? Should I ask him to add my thesis retroactively to the paper? Should I contact the workshop organisers? If yes, what should I tell them?