Centurion Trooper

Another Red Alert Zero artwork;

This soldier wears an exoskeleton-assisted suit of lightweight armor, and carries a submachinegun to use while moving, and a deployable grenade-launching machinegun for defense.

The machinegun has a fairly high rate of fire, and although each shot doesn't do much more damage than each shot fired by a Marine or Conscript, the explosive damage hits multiple enemies at a time- and more importantly, do more damage to vehicles.

On foot his submachinegun does high damage to un-armored targets and close-range (replacing the commando units in past Red Alert games), and can enter buildings to flush out occupants (like the Marine unit can).

At Elite level, they are outfitted with computerized sights on their grenade launchers (increasing range and allowing them to empty buildings by shooting at them), and a power-shield that enhances their frontward protection (moreso while on foot).

Design-wise, you may note that this suit looks awfully familiar to the real-life "Trojan" Ballistic battle suit by Troy Hurtubise - which it is somewhat supposed to be albiet with extra plating and a thicker helmet. That aside it also looks a little bit like the Halo suits too (both armors are pretty similar). The grenade gun is simply a miniaturized version of the XM307- a real grenade machinegun (though one that needs to be serviced by two people, rather than one), and the sidearm is a fictional heavy-caliber successor to the MP-5 (not much similarity in design I imagine).
The Shield was a quick idea- shying away from a plain shield (as he already HAS armor), or a purely energy-based shield (WAY too advanced), it is somewhat a half-way technology. A solid heavy-duty alloy with energy projectors on top- to absorb a little extra fire.