Dennis Walter Hearne is an American diplomat who served as the United States ambassador to Mozambique from 2019 to 2022.

Hearne earned a Bachelor of Arts from Wake Forest University and a Master of Science from the National War College.

His previous positions include serving as Deputy Chief of Mission at the United States Embassy in Kabul, Afghanistan, from 2016 to 2017; Senior Advisor to the Under Secretary for Political Affairs from 2015 to 2016; United States Consul General in Rio de Janeiro, Brazil, from 2009 to 2012; and as foreign policy advisor to United States military commanders, including two years of service in combat operations in Afghanistan.

[1] On August 31, 2018, President Donald Trump nominated Hearne to serve as the United States Ambassador to Mozambique.

[2] His nomination was confirmed by the United States Senate by voice vote on January 2, 2019.