Many of my friends in police work and military special ops encourage me to go some sort of counseling route...as you must know if you work in the field, folks do not think very fondly of mental health professionals and do not run with open arms to discuss whatever they have experienced or are feeling....I will always be "one of them" and would hope that would lead to more of an open dialog and immediate trust. It would also be worthwhile for me to work in that capacity, even if it was volunteering my time. I just do not want to go into another academic program at my age and feel like Im not getting realistic training from someone or a group of professors who have actually done legit work in the "real world"...
Ah yes, getting buy in from people in these fields is extremely difficult, UNLESS you have a reputation for being able to walk the walk as well as talk the talk. Even then you will never have instant credibility and immediate trust. Although you may always see yourself as "one of them" they will not, they will see you as someone who "used to be one of them". Your experience will allow you to bridge gaps faster and more effectively than less experienced or inculcated peers, but you will never be "one of them again". Your role will have changed, and this is something that you will need to remember/remind yourself of, as you move forward to assist fellow officers in new ways and as you assume new responsibilities. Just as team supervisors are never "one of the guys" again, the role of psychologist or counselor takes you out of that "one of the guys" role as well. It's not a bad thing, it's just something you need to remain aware of.
As you are probably well aware, many times, in these populations the "pathology" may be subclinical or even functional. Finding training that will prepare you for this specific population will be at best, difficult. The best training you have is training that may never be taught in a specific program (or at least not one I am aware of outside of some specialized conferences for LEO/Military applications). Your experience as someone who has served both in military and law enforcement communities will allow you to know things that others simply might miss. It's flat out cultural competence. A lot of discussion occurs about diversity training and the importance of cultural competence. The work of Sue & Sue is often held out as the gold standard in cultural competence, yet in 26 chapters and over 550 pages, cultural competence regarding military or law enforcement populations is never addressed. Yet, as a minority, US Military and law enforcement members make up approximately 4,000,0000 persons, with it's own unique culture and values (just over 1% of the US population).
You have many of the core cultural values that you would need to master simply by having served, what you will need is to learn how to leverage those values into cultural competence in the practice of psychology/counseling should you decide to pursue training. Obviously there are schools that will share more core values with the populations you seek to treat, but I think you'll realize quickly that no one can teach you the things that your experience allows you to bring to the table.
Military and law enforcement patients, may be difficult to get into the office initially, but once you have them there these are some of the best patients in the world to work with. Often times they are motivated, sincere, and have an overwhelming desire to be successful. (Yes, there are patients who don't want to get better or who are working the system too.) Reducing stigma is a big part of the job, past credibility, that can get your foot in the door. As you must realize there are many other aspects to the job as well (critical incidence debriefing, behavioral science consultations, fitness and suitability evaluations, forensic evaluations).
I am really going to stick to my guns here and continue to state that getting a well rounded clinical skill set is what you should be focused on. Few at the academic level will really understand the experience that you may have in this respect. The mentorship you seek from others through practicum and internship experiences, that is where you're going to want to try to differentiate your training if anywhere.
I realize this is a little preachy here, but look at the training as the canvas, paint, and brushes... they are tools in which to create the art. What you put down on that canvas, that's all you. The skill in which you use the canvas, those foundational skills should not change and do not need to change, but rather your approach will be different.
I realize that I have restated a lot from before. I should be clear in where I am at in my training, since my training is certainly not complete and I do not wish to hold myself out as an expert in this area, but rather someone willing to share my personal experience. I am nearly done with my clinical internship. So I am not a psychologist, I currently am working towards completion of my Ph.D. from USUHS. I served 9 years on active duty in the USAF as an enlistee prior to returning to college to eventually pursue a career in military psychology, which with any luck will begin shortly after I complete my internship here in Portsmouth. I wish you the best of luck.