The other side of this question can be found here: How to use lighter soldiers
Imagine that tomorrow we invent a way to create soldiers that are almost the exact same in every single way as our current ones, just heavier. They have the same stamina, the same carrying capacity (not counting their weight*), they are the same size, aren't fatter or thinner and have the same amount of energy stored in their body.
Let's say for convenience sake that they can be anywhere between 20 kilos more weight up to three times the weight of an "ordinary" soldier. You can pick different weights for different tasks if you want if that gives them a better edge.
My question is how these soldiers would be used in our current day and age. What tasks would they be put to compared to their "normal" soldier counterparts.
I'm not interested in what they specifically won't be doing, I just want to know what tasks they would fulfill as infantry. Would always take point in an infantry formation or always hold back. Would they carry specific weapons to aid in their task etc.
*This means that if an 90 kilo normal soldier can carry 20 kilos of gear effectively, that the heavy soldier even if he weighs 200 kilos can still carry only 20 kilos of gear but still have just as much stamina etc.