User blog comment:Dragonzzilla/ME3 Multiplayer DLC I Ideas/@comment-1921586-20120501162038/@comment-4692902-20120502015359

It may not directly count as a biotic attack, but its definitely counts as a biotic ability, suggesting that particular Krogan has some biotic potential, also, if you look at all the other Sentinels they all have some biotic ability or attack. I always thought that the requirements for the Sentinel was somebody who has both tech and biotic potential, the Sentinel Salarian does not ANY kind of biotic ability, so I think its better classified as an Engineer as it fits the requirements for that class.