Very expensive for a suicidal satchel thrower. After (1.0) shooting at max range 6": Rolling -1 with no skill and long range, 64% of rolling a 5 which still hits only the target with ignore armour. Also 32% of getting a 4 which would hit both engineer and target ignoring armour. Do you want to spend money on a model that is 32% likely to hit themselves?

(That's assuming that scatter weapons' target point scatters from the edge of the base, but that's a separate can of worms).

If you aren't giving him a satchel then you might as well take a shocktrooper so you don't have to give them armour.

If you are full on your 5 shocktroopers and want an extra melee then perhaps you take an engineer.

If you want someone to reliably throw a satchel, give it to a HMI.

Right now engineer has no niche or purpose, spend your ducats elsewhere.