Yes, Vindman shared his concerns with his superiors and I suppose he may have also discussed it with others in the administration, that's not the same as leaking it to "secret operatives", i.e. a spy. There has been no evidence of that.
He did try to update the "transcript" of the call to include pertinent details that were left out. He was on the call, he heard it, and he was prevented from doing it, wonder why. I imagine we will hear from Vindman in public hearings, I look forward to that.
I think it is shameful to call Vindman a "ponpus nut job" or question his integrity and credibilty.
This from ABC news:
"For more than two decades, it has been my honor to serve as an officer in the United States Army. As an infantry officer, I served multiple overseas tours, including South Korea and Germany, and a deployment to Iraq for combat operations. In Iraq, I was wounded in an IED attack and awarded a Purple Heart," he wrote matter-of-factly.
Then, as a Foreign Area Officer, a role that deals with political-military affairs, Vindman served in the U.S. embassies in Kyiv and Moscow. His last post in that role was in Washington, D.C., serving as a Eurasian specialist before being tapped to be a part of the National Security Council in 2018.