# Looking for a Space marine RPG similar to Starship Troopers (the Novel)

I'm trying to find an RPG that appropriately reflects the feel of Robert A. Heinlein's Starship Troopers and could use a system commendation. (The novel, not the movies. They're very different in many ways; all of them relevant to this question.)

Background: I've got a lot of experience with D&D 4e and small experience with GURPS 4e and no actual play experience with Cyberpunk 2020 (but I really dig the style and the combat system).

Out of Scope: I've already discounted the actual Starship Troopers RPG because it seems to draw primarily from the profligate movies, animated movies, and animated series that basically miss the focus on small infantry tactics and political discussion that the books feature. Warhammer 40k is also out of scope since I feel its overly simplistic and juvenile in its world building.

In Scope: I have no specific system reservations, but there are features I'm looking for.

Preference for grid-based combat w/miniatures. The system should feel tactical without being weighted down by too many dice rolls or too many subsystems. My goal is to emulate the feel of small superior and armed force fighting a numerically superior enemy (Battle of Mogadishu and Battle of Rorke's Drift for historical examples) while utilizing...

• The specific sci-fi elements of Heinlein's setting: power armor with jump jets, various weapon options and configurations for power armor suits, as well as orbital drops (ship to ship combat is fine, but should not be the focus) such as those in Starship Troopers.
• A framework or guidelines for interactions outside of combat. RP rules covering interactions between PCs and NPCs outside of missions would be "nice-to-have," but are not a requirement. Rules that would cover maintenance tasks (skill checks) that could help or hinder players later when the mission occurs are also in the same boat.
• I would prefer a class/role based systems for PCs, or if it's a skill-based system, that there is room for divergent character roles in combat (i.e. there are enough incentives for players not to all take only "kill everything" skills/powers/feats). PCs have to have different roles in the squad based on equipment and class/skills.

This is my first system recommendation question on RPG.SE so please let me know in the comments if you want more requirements/clarification.