How would you go about building one of these? Since the Commando feels like more of a frontline trooper than his name suggests.

Depends on your definition and intent.

Like "Jedi" in FaD, elite commando types are probably multi-specced to really get the right feel. The Commando is probably a sound foundation Spec for both, though moreso for the SEAL analog as SEALs tend to be more "go there, do that" kinda guys, where SF has a tendency to get missions along the lines of "Go there, do that, now teach the locals to do it too."

For the SEAL, I'd also suggest you try and hold out another month or so as the "Vanguard" Spec in the Soldier book coming out might work depending on what it looks like. Likewise the Trailblazer would probably go for the "long ranger" type when talking SF. https://www.fantasyflightgames.com/en/news/2016/5/10/forged-in-battle/

When it comes to training the locals, the Commander:Instructor is an obvious choice for a SF analog.

It's also worth mentioning that both SEALs and SF tend to work in teams with certain specialists. So you'll have a weapons guy, a medic guy, a commo guy, and so on, so that's where the multi Specing comes into play. It'll cost a few extra XP in a couple cases, but mixing and matching existing Specs from the entire line will give you some pretty "special" soldiers. Driver, Pilot, Outlaw Tech, Demo, Assassin, Slicer, Analyst... There's ample Specs out there that, when paired with commando, and played smartly will give you the "Special Ops guy," (or perhaps in your case, girl) that you're going for.

There's other details you can think about when looking at your design, watching a few documentaries on AHC or Netflix will tell you a lot. So like SEALs are really good at small unit missions, but aren't well trained in leadership and large operations. So when they need to slip aboard a freighter and sink it, they do so without even being seen. But when they get a mission to combine multiple SEAL teams and work together to capture an airfield, they get cut to ribbons.

So when making a "SEAL" you could skip some of the Face type Specs and focus on combat and stealth type specs. SF on the other hand have a primary mission of supporting local guerilla forces, so having a Face and some leadership skill is more appropriate, and also opens the game to take part in larger encounters with the player leading a squad of guerillas.

The above

I think Ghostofman pretty much nailed it. US Special Forces inspire a great deal of debate among civilians and members of the military who don't actually deal with them. I don't think you were really trying to debate the virtues of one type over another, so I'll lend a few thoughts:

• Special Forces represent the best of the best - they are smarter, tougher, better-equipped, and better-trained than any conventional formation in the military
• Single-spec commandos are quite effective in the field of direct combat
• Combining equal parts commando and almost any other AoR spec creates a great "team specialist" concept. Medic, Sharpshooter, Driver, Gunner, Tactician, Strategist, Agitator, Quartermaster, Saboteur, and the aforementioned Instructor are all great builds
• The upcoming Vanguard feels (to me) much more like Republic SpecForces from the Old Republic MMORPG; heavily armored assault troopers. The Trailblazer might be more like what you're looking for
• Depending on the level of realism you're looking for, a US Army Special Forces "A-team" (Operation Detachment Alpha) is led by the Detachment Commander, a commissioned officer, and his second-in-command who's usually a warrant officer. The team also includes the following enlisted men: the Operations Sergeant who is the most senior NCO, an Assistant Operations and Intelligence Sergeant, and two each Weapons Sergeants, Engineer Sergeants, Medical Sergeants, and Communications Sergeants.
• Operations are usually conducted with 6-man split teams, allowing the commander to configure the team to the mission profile.

Finally, if you've never read any of Karen Traviss' Republic Commando novels ( Hard Contact, Triple Zero, True Colors, and Order 66 ), I'd highly recommend them. Despite Traviss' Mandalorian fetish, they offer an entertaining insight into clone commandos, their training, gear, tactics, and the use of individuals' specializations to bolster the unit as a whole. There are a lot of real-world histories & documentaries, but her books are entertaining and are already set in the SW universe (albeit non-canon).

Speaking of Republic Commando, my go-to example for Soldier/Commando is Delta Squad itself, but based on the video game they first appeared in.

Boss - Squad Leader - Soldier: Commando/Tactician

Fixer - Slicer - Soldier: Commando/Slicer

Scorch - Demolitions - Soldier: Commando/Saboteur

Sev - Scout Sniper - Soldier: Commando/Sharpshooter

All of them would improve Brawn and Agility to 3 with starting experience, and would select Athletics, Brawl, Ranged (Light) and Ranged (Heavy) for Soldier starting skill ranks, followed by Brawl (for a total of 2) and Resilience from Commando, representing their common training regimen.

They would increase a third characteristic based on their intended battlefield role: Boss would improve Presence, Fixer would improve Intellect, while Scorch and Sev would improve Cunning.

As Humans, they would all select Stealth as their first non-career skill rank, but the second would again be based on their role: Boss would take Leadership, Fixer would take Computers, Scorch would take Skulduggery, and Sev would take Perception.

With ten of the remaining experience, they would all buy the second rank of Ranged (Heavy) first, in order to (more) effectively use their main weapon, the DC-17m. The remaining ten* experience would then be banked, in order to take their second spec as soon as possible.

Assuming they get 15XP after session 1: Boss, Fixer and Scorch would bank all 25XP (as they are all 5XP short for their second spec), while Sev would be able to take Sharpshooter already, with enough experience left over to take the Sniper Shot talent. After session 2, Boss, Fixer and Scorch will take their second specs and first talents, marking the point their builds start to diverge in order to fit their respective battlefield roles, with everyone dipping back into the Commando tree every so often to eventually get Armor Master (and its Improved version) and Dedication from there.

* While Commandos are special clones with a sense of individualism, they are still manufactured Republic soldiers in active service, so I do not see these guys as opting to reduce their Duty. They don't need extra credits either, as they are outfitted by their quartermaster.

• Depending on the level of realism you're looking for, a US Army Special Forces "A-team" (Operation Detachment Alpha) is led by the Detachment Commander, a commissioned officer, and his second-in-command who's usually a warrant officer. The team also includes the following enlisted men: the Operations Sergeant who is the most senior NCO, an Assistant Operations and Intelligence Sergeant, and two each Weapons Sergeants, Engineer Sergeants, Medical Sergeants, and Communications Sergeants.

Paaaa-lease, everyone knows an A-team is composed of a Leader, a Muscle guy, a Face, and a Pilot.

Also everyone knows it's time to retire said A-team when they rescue Boy George so he can play at a country bar.

Radon,

I'd say that Delta Squad (and probably all Republic Commando teams) started out as Knight Levels PCs, giving them the extra 150 XP to really "flesh out" their ability in their respective MOS.

Hired Gun:Demolitionist (in dangerous covenants) makes for a great special forces/covert operative starting spec, class skills are practically perfect (i'd drop melee and pick up stealth personally) a toughened 3 grit, enduring, rapid reaction, time to go and improved time to go... sure there are a lot of big boom talents but that pairs nicely with strong arm from either the hired gun:mercenary soldier or soldier:commando, and hired gun gets lat one standing as a signature ability. Ithe pairs well wit hired gun aND gadgeteer. I'm pretty interested in seeing what vanguard looks like too