Machinist

"Being the colonel from the Vietnam War, the Machinist is a class that's an expert with weapons and machinery. He also has the ability to dismantle any of Tinkerer's buildings and utilize a powerful battlesuit (that comes with a minigun) to control crowds of enemies."

The Machinist is a specialist class that can destroy any of the Tinkerer's buildings and annihilate any Phantoms nearby (as long as Dismantle can be used). He's the only class in the game that has armor that can deflect any melee weapon (the Chainsaw and Ninjatō), can instakill a particular class, and destroy any of Tinkerer's buildings.

Heavy Suit
Heavy Suit is an ability that allows the Machinist to equip a powerful battlesuit that deflects any damage by half (melee damage is completely nullified). Not only that, the Machinist is given a Minigun that can deal an incredible amount of damage up close. The suit and minigun only lasts for 30 seconds.

Reload Time: 120 seconds.

Dismantle
Dismantle is an ability that can destroy any of Tinkerer's buildings (whether it be the Sentry, C4, or Land Mine). Though there's also another usage that can instakill Phantoms when locked. You can also use the lock-on feature (by pressing Q over your target) to make sure you can hit your target.

Reload Time: 15 seconds.

Emergency Supplies (E. Supplies)
Emergency Supplies, also known was "E. Supplies", is a toolbox that grants the Machinist any of the weapons within the game (excluding specials and melee weapons). Though this can only be used once.

''Reload Time: None! The ability cannot be used after usage.''

Mecha-Fist
Mecha-Fist is a close range melee special that can deal 35 damage towards a target within a 12 stud radius. This can only be used when the Heavy Suit is equipped. You can also use the lock-on feature (by pressing Q over your target) to make sure you can hit your target.

Reload Time: 5 seconds.

Trivia

 * The Machinist is the only class within the game that can instakill a particular class with an ability.
 * The Machinist is the only class within the game that can destroy any of Tinkerer's buildings.