Am I obligated to finish my post-doc term before starting my tenure-track job?

I am currently a postdoc at a research university. I had originally intended to stay at my postdoc for two years, and this was the understanding I had with my postdoc adviser.

However, I decided to speculatively apply for a few faculty jobs, intending to defer any offers for a year. I have now obtained a faculty job offer to start at the end of one year of my postdoc.

After much reflection, I believe that it is better for my family life not to ask for a deferral and to start the faculty job earlier. In the event that I take the faculty job offer, I still intend to continue and finish the research work which I have started with my postdoc adviser, so I will not be hurting my adviser by starting but not finishing my postdoc work.

Question: Do I have an ethical obligation to stay at my postdoc for two years, because that was my initial plan and was what I told my postdoc adviser? Should I expect him to be understanding when I choose what is best for my family?

The following timeline may explain the sequence of events more clearly:

• March 2014 I was applying for postdocs, and I told my potential postdoc advisor that I was intending to stay for two years at the university if he were to give me an offer.


• April 2014 I was hired with a one-year contract starting August 2014. My adviser explains that there is a good chance my contract will be renewed at the end of the year.


• Sept 2014 I decide to apply opportunistically for a few faculty positions just in case I can get a good offer, and intend to ask for a deferral, so that I would only start my faculty job in August 2016.


• Jan 2015 I get a faculty job offer to start in August 2015.