Pros
The work that HSI performs is very interesting, relevant work. HSI has a reputation for providing solid work that supports a range of decision-makers within DHS. Also, the types of analysis being performed are generally fairly cutting edge, particularly in the Operations directorate. HSI also allows employees to gain significant visibility into DHS. As a mid-level employee I conducted multiple one-on-one meetings/interviews with some very high-level decision-makers. This type of exposure allows HSI to be a great stepping stone, either to other analysis organizations/companies, or to federal employment.
Cons
There are a finite number of leadership opportunities available within the institute. Because HSI is relatively top-heavy with Principals and Fellows, mid-level employees may have trouble securing leadership positions. There is a bit of a running joke at HSI that it is a great place to be either a junior employee, or a senior employee. Some people are able to get promoted into the more senior positions, but these are few and far between.