Nicole Stinn-Tiernan (born Nicole Stinn in Vancouver, British Columbia, Canada) is a Canadian producer and animator. She was the Chief Executive Officer (CEO) and President of Nitrogen Studios from 2003 to 2017. She produced the CGI Series of Thomas and Friends from 2009 to 2012. She also worked on the twelfth season as unit producer for Nitrogen Studios.

She replaced Simon Spencer as producer of the series in 2009 and was replaced by Robert Anderson when production was taken over by Arc Productions in 2012.

Nicole and Greg Tiernan started Nitrogen Studios in 2003.





  • She is married to Greg Tiernan.
  • She has been working in the animation industry for over nineteen years.


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