Our Team


Jennifer Twiner McCarron – Chief Executive Officer

Jennifer joined Atomic Cartoons, Thunderbird’s kid division, as head of production in 2011, where she helped grow the company from 25 artists to more than 450. In 2016, Twiner McCarron was promoted to the role of President and CEO of Atomic. Under her leadership, Atomic shifted from being primarily a service hub, to become a full-fledged, independent content creator, producing content such as Beat Bugs and The Last Kids on Earth for Netflix, and optioning the rights to New York Times best selling books, such as Savannah Guthrie’s Princesses Wear Pants. In June 2018, Twiner McCarron was appointed CEO of Thunderbird Entertainment, a role which oversees all of the Company’s animated, factual and scripted divisions.


Mark Miller – President

Mark is the President of Thunderbird Entertainment. He founded Canada’s leading factual company Great Pacific Media which was acquired by Thunderbird in 2014. He is a rare mix of successful entrepreneur and artist. He is an award-winning writer, producer and music composer. His insatiable curiosity and drive for excellence are at the root of his unprecedented commercial success in the international market.


Matthew Berkowitz – Chief Creative Officer

Matthew Berkowitz is the Chief Creative Officer of Thunderbird Entertainment and Atomic Cartoons and oversees the development, production and acquisition of intellectual properties across both companies. A seasoned executive with over a decade in the industry, Matthew is an Executive Producer of Atomic and Netflix’s The Last Kids on Earth and Hello Ninja, as well as Atomic’s upcoming Princesses Wear Pants Chief Creative Officer. Matthew is also a Producer on the upcoming feature film Extinct, which is directed by David Silverman (The Simpsons Movie, Monsters Inc) and written by The Simpsons veterans Joel Cohen, Rob LaZebnikand John Frink. Throughout his career, Matthew has established production relationships with Sony Animation, Dream Works Animation, Amazon Studios, Lego and Zodiak. Matthew regularly attends worldwide markets including MIPCOM, Kidscreen, Annecy, Comic-Con and Licensing Expo. Matthew graduated from the S.I. Newhouse School of Public Communications at Syracuse University and is the proud father of three daughters.


Barb Harwood – Chief Financial Officer

Barb is Chief Financial Officer of Thunderbird and is responsible for corporate and production finance, accounting and taxation. Barb obtained her CA designation while working for Ellis Foster Chartered Accountants (now Ernst & Young) as manager of the entertainment division, and previously held the position of CFO for Paperny Films. Barb is a graduate of the University of British Columbia with a BA in Film.

Sarah Nathanson

Sarah Nathanson – Vice President, General Counsel

Sarah Nathanson is VP, General Counsel where she provides legal and business affairs support to both the production crew and the corporate team across the Thunderbird Group of Companies. She has more than twelve years of experience in entertainment law, both in private practice and in-house. Sarah was previously Director, Business & Legal Affairs at DHX Media. She has worked on numerous productions, including the Cloudy with a Chance of Meatballs television series and My Little Pony.


Jhod Cardinal – Director of Distribution

Jhod has financed, sold, and produced films for nearly fifteen years. His International Sales experience includes all major film markets such as the Marche Du Film – Cannes, Filmart, AFM, MIPTV, TIFF, NATPE. In 2009 he founded Upstream Flix, which creates progressive sales opportunities for independent film projects, and has also worked with Joker Films, Breakthrough Entertainment, Insight Film Releasing, Force Four Entertainment, and Keystone Entertainment.

Ed Sayer – Executive Vice President

Ed joined Thunderbird in 2019 as Executive Vice President and heads up the International arm.  Based in London he is responsible for growing the company’s presence outside of North America.  Sayer is an experienced executive producer and international channel commissioner who has led numerous creative and ratings successes throughout his career and has been responsible for many international hits including The Science of Stupid, T. rex Autopsy, Idris Elba Fighter and First Man Out amongst others.  Prior to joining Thunderbird, Sayer was Head of Original Commissioning for Discovery Networks International, was VP for National Geographic Channels International and held senior positions at the BBC and ITV.


Kristin Cummings – Vice President, Atomic Originals 

Prior to joining Atomic, Kristin was most recently Director of Development at NBCUniversal/DreamWorks Animation TV where she developed kids and family content. Kristin started in animation as an assistant at Nickelodeon. Throughout her career there, she worked on several projects in series development, including the recent hit show The Loud House and was the Creative Executive on the 2014 animated shorts program. In 2016, she moved over to NBCUniversal/DreamWorks Animation TV to help build out their slate with original ideas, book adaptations, and Universal IP for both the preschool and older kid demographics. In partnership with their UK office, she developed Rhyme Time Town, a new DreamWorks preschool show coming to Netflix. She also helped develop and sell the DreamWorks animated show Jurassic World Camp Cretaceous among other unannounced series.

Aaron Behl headshot

Aaron Behl – Vice President, Atomic Originals 

Aaron previously worked for Broken Lizard comedy group founder and director Jay Chandrasekhar (Super TroopersThe Dukes of Hazzard) working on the cult comedy Beerfest and various television shows including Chuck, Community, and New Girl. During his time with Broken Lizard, Aaron developed and produced the Super Troopers 2 Indiegogo crowdfunding campaign, helping raise over 4.5 million dollars online and served as an Associate Producer on the 2018 Fox Searchlight theatrical release. Prior to Atomic, Aaron worked for digital ad crowdsourcing agency, Tongal where he specialized in producing digital children’s and adult animated content for brands such as Mattel (Hot Wheels, Thomas & Friends), Riot Games (League of Legends), Project Greenlight and Uninterrupted (Becoming Bobby Feeno).