I'm a software engineer and team lead, with several years of experience that during the last 2 years was enrolled in an international Master program in Computer engineering.
In a few months I will need to start working on my thesis, that could be both a research project or an internship in some company. In both case I will be on leave from my company for a few months.
In some way I would prefer to work for a company in a position different than my current one to test the waters and potentially make a move and change job. My company would be okay with me working for a different company, but not so much to know that I could change job afterwards.
Problem is, I'm quite experienced and I think that introducing myself to a new company as an intern would prevent me from been considered for a serious role in the future but at the same time it doesn't make sense for me to be hired for a few months in a "real" position for my thesis project(both because I already have a job and because I can be there only a few months).
First of all, is what I want to do unethical or wrong towards my company or the other hypothetical company?
If it's not, what is in your opinion the best way to approach a new company and present my plan?