Although there are many skills and responsibilities that overlap, I see the three most obvious differences as:
1) Their respective operating environments;
2) Common engagement distances;
3) Military ROE vs. LE use of force laws/policies.
I think the other big difference is regarding doctrine and training. Besides the differences and rivalry between various .mil service branches, and GPF/SOF sniper courses, it seems that military snipers are trained to a common standard, for lack of better. These sniper schools are weeks-long in duration, cover most operational considerations and are very demanding to say the least.
Compare and contrast that with LE sniper training. There is no standardized doctrine or POI, and many states don't even require any type of training before being deployed in that role. LE sniper schools - commonly only 50hrs-to-160hrs in length - are oftentimes just "shooting schools." The better ones are able to cram-in an introduction to all the various things you need to get better at once you leave (observing and reporting, movers, intermediate barriers, hide construction). If a LE sniper school doesn't include use-of-force/deadly force legal considerations in the POI, that is a glaring oversight and not an uncommon error when someone with no LE experience jumps into that instructor pool.
Although cops have been forced to use their newfound sniper skills soon after getting a diploma, I would be hard pressed to say that most LE snipers are "ready" (barring prior experience) for a real-world callout just because they went to a weeklong, basic sniper school. Just as we don't unleash a rookie police officer fresh from the academy onto the unsuspecting public without a FTO program, my team's snipers undergo a lengthy OJT process, in additional to monthly inservice training to fully prepare them to do the job... until then, they're just an armed "observer", no pun intended and MUST be paired-up with an experienced sniper. We also don't allow "new" guys to become snipers, instead requiring several years of service on SWAT before you can make the jump. That ensures that the guys behind the gun understand what's going-on "inside the house" and can factor that knowledge into their decision-making process.
I wish every cop sniper was a member of
The American Sniper Association and adhered to accepted best-practices regarding this specialty field, but that just isn't the case.
I can't comment much on the LE side of the house, but a military sniper is more then just a precision shooter; he is an autonomous or nearly autonomous reconnaissance element. [strike]He acts as a forward observer for indirect fire or CAS[/strike] (something I certainly hope our LE brethren will never need to do - As Do I!). He also has to be a highly proficient [strike]soldier[/strike] law enforcement officer before he even sets foot down the path to be a sniper.
I think much of your first paragraph actually applies, when placed into a LE context. In my experience LE snipers - or whatever "nice"/PC word an agency gives them - are oftentimes separated from the main element, responsible for their own deployment/movement, equipment, security and sustainment (they never deliver pizza or hamburgers to us - sniff, sniff). Unless they are forced to live under a "Green Light" policy (ie: only fire when specifically authorized to do so by a command element - which is pure negligence IMHO) police snipers can have a lot of autonomy and flexibility to fit into a situation as best as they can. I rarely have to get "permission" to do something I want to do in order to support my team.
That said, all of the listed differences still apply...
Regardless of how a SOP dances around the issue, the primary responsibility of a LE sniper is to
Protect the Team (Public). That is most oftentimes done by providing timely and vital intel to the rest of the team. There is also the rare - but ever-present - possibility that an officer may need to use deadly force against a dangerous suspect in order to prevent them from causing the death or serious physical injury of an officer, hostage or bystander.
Of course many things in your second paragraph don't cross-over between the two worlds. Now I do know of LE snipers that have infiltrated by helicopter, conducted lengthy foot movements, had to rely on spotty comms (that's pretty common, actually!), etc, etc - but some things that may be common for .mil snipers are very UN-common or never-gonna-happen for most of law enforcement.
There are skill-sets and operational considerations that just don't translate in either direction - or very rarely so. Cops usually deal with a very compressed surveillance/engagement area, generally "control" the area where they are handling a callout or warrant (although working in "not cop friendly" places is very common as well) and sustainment, relief-in-place and medical evacuation can usually occur in minutes or hours on the police side of things.
I don't doubt the dedication or skill of LE snipers, or that they could do anything mil snipers do with the same training. What I am saying is that just as the individual police officer and individual soldier have different jobs, so do the respective snipers.
Well said, well spoken.
I have trained "with" .mil snipers during my active-duty days (I was never a military sniper, just to be clear) and as a LE officer. I have also provided training "to" .mil snipers when they wanted to develop skills more commonly associated with LE snipers. Either way, I have always been impressed with the knowledge, stamina, dedication and skill of military snipers. When I've shared a range with them, experienced .mil snipers always excelled at making accurate wind-calls and smacking first-round hits on long range targets.
Good discussion and I wish good hunting and a safe return home to our deployed military snipers.
Stay Safe everyone….