This font is a classic in the LEGO community. It is named after its creator, Eric Harshbarger. Being a SNOT font it's a bit complex - it consists of a mixture of plates and tiles in different directions. The reward of this complexity is it's compact expressiveness: all letters are 10 plates high and roughly 3 studs wide.
To mount this font, create a frame out of bricks that is the size you need, and then slide all parts into it. If you lay the characters down on the studs of a plate and put bricks around them they will be at the same level. See the example Jane Doe for a demonstration of this. Since some letters are exactly 3 studs wide, some just below and others just above you might have to adjust the frame using headlight bricks, brackets or other half plate offsets. This is done in the Eric example. We also cover the edges up with plates to create a sculptural feel in that one.
Some characters here have been slightly modified compared to Eric's original version. The J broke the overall feel of the font, so it's needlessly large serifs was removed. The X is a bit unwieldy as well, but it's hard to come up different solutions. Let me know if you do.