David Holmes joined the United States Foreign Service in 2002. He served in several international assignments, including Kosovo, Bogota, Kabul and New Delhi. On his return to the U.S., Holmes served in Washington, D.C. from 2010 to 2011 as special assistant for South and Central Asia to then Under Secretary of State for Political Affairs William Joseph Burns. He was later detailed, from 2011 to 2012, to the United States National Security Council staff at the White House as director for Afghanistan. He then became the senior energy officer at the United States Embassy in Moscow, and then Deputy and Internal Unit Chief in the Political Section.
In 2014, the American Foreign Service Association awarded the William R. Rivkin Award for Constructive Dissent to Holmes. The award recognizes "demonstrations of intellectual courage to challenge the system from within."[3] He reflected on his work on Afghanistan and South Asia when he filed a formal Dissent Channel message in February 2013, arguing that multiple channels of authority within the State Department covering similar territory "hindered our diplomatic effectiveness."
U.S. Embassy in Ukraine
Holmes is currently serving as a Counselor for Political Affairs at the U.S. Embassy in Ukraine formerly under U.S. Ambassador to Ukraine Marie Yovanovitch and later William B. Taylor Jr., who was appointed to the role of chargé d'affaires for Ukraine under the Trump administration. The focus of Holmes' role is to help "Ukraine consolidate its democracy, reinforce the rule of law, advance justice and anti-corruption reforms, bolster civil society, and promote a responsive, responsible government."
Holmes was called to testify in a closed deposition as part of the impeachment inquiry against Donald Trump, and did so on November 15, 2019. Holmes testified that he overheard EU ambassador Gordon Sondland speaking to Trump via cellphone in a Kyiv restaurant, hearing Trump ask, "so, he's gonna do the investigation?" to which Sondland replied, "he's gonna do it", adding Zelensky would do "anything you ask him to". Holmes also testified that Sondland later told him that Trump "did not give a s—t about Ukraine" and "only cared about the big stuff ... the big stuff that benefits the president like the Biden investigation that Mr. Giuliani was pushing." He also recalled that Sondland characterized Zelensky's feelings toward Trump by telling the latter that Zelensky "loves your ass." He also said that there were two other state department witnesses to this as well, and has now become a prominent witness of the ongoing impeachment inquiry and the Trump–Ukraine scandal.
https://en.wikipedia.org/wiki/David_Holmes_(diplomat)