the homepage of Jeffrey Ellis

About Me

I’m an engineering manager, originally from Cincinnati and now living in Houston, Texas. I spent the first 20 years of my career in defense and intelligence, and for the past 15+ years I’ve worked in human spaceflight in and around NASA’s Johnson Space Center.

In my spare time I occasionally develop software applications, and for many years I ran both a solo blog and a group blog on critical thinking and civility. This homepage is my place to collect up my more useful critical thinking materials, and to make some of my software apps available for download.

I can be contacted at

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