(Computers , photos, and I don't have a working relationship, FYI)
As a deputy, on-duty I carry an old Cold Steel tanto on my right lower leg under my uniform pants. I also carry an American Kami custom under my outer vest carrier, very similar to his Kiridashi, only about an inch longer. My son had it made for me for a father's day present. It felt really strange the first time I picked it up, but within a few minutes, I fell in love with it, and now own a handful of American Kami knives. He makes a very unique style of knife, but extremely user-friendly! When I am on a SWAT call, I wear a Strider BT. It is built like a tank.
Off-duty I wear a Strider WB MOD10 upside down on my pants belt. It might sound uncomfortable, but it rides up along my side, out of sight (I always wear an outer shirt of some sort), out of the way when I sit, and yet is instantly available when need be. Since there are two straps securing it in the sheath, I have NEVER had an issue with it dropping out of the sheath. NEVER.