At first glance, that number seemed too low. It is probably correct; they had earlier split the company nearly in half. From their 2014 annual report:
Chesapeake had approximately 5,500 employees as of December 31, 2014 compared to approximately 10,800 employees as of December 31, 2013. As a result of the spin-off of our oilfield services business in June 2014, we experienced a reduction of approximately 5,100 employees.
http://www.chk.com/Documents/media/publications/annual-report-2014.pdf
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That oil field services company spin off ain’t doing so great either.