>The concentration of deaths is entirely implausibly described as "suicides",

The article talks about 19 people. Given the size of those organizations that's statistically elevated but too small a number to descend into conspiracy theories. As the article points out they apparently had internal warnings and studies about lack of mental support for people in signals intelligence and cyber related roles.

Given that this cluster of deaths seems to have happened in June/July, the Iran war and how the American government has conducted itself I don't find it surprising there's elevated numbers of suicides. You don't need to be on the frontline, if you're in sigint and involved in that attack on the school that casually blew up 150 girls and probably the stuff we don't know about I wouldn't be surprised people off themselves.