Hello, I got my green card in E17 category which is for outstanding researcher category (EB1). As the research grant money is reduced, I got this position for next 3-6 months. Can I change the jobs from E17 category to different category which do not come under EB1 green card application process? How does this affect the N-400 application process for citizenship later on. Is it a good idea to get a letter from my employer stating the reason for leaving the job ( reduced grant money) which I can use during N-400 application or it does not matter? Thanks in advance for your replies.