I worked for the MITRE Corporation https://www.mitre.org https://www.mitre.org for many years, and can confirm they use offices. There are some open floor plan

I worked for the MITRE Corporation https://www.mitre.org https://www.mitre.org for many years, and can confirm they use offices. There are some open floor plan labs, but almost all employees have an office, usually shared with one other person.