So it might help to get the terminology correct...
Looks like you need to make a "Monument Sign" or what most municipalities call, "Ground Sign"
First thing is look up what you are allowed to have - most sign codes will dictate the square footage based on the linear footage or acreage of the project. It should also stipulate your height allowance and placement(s)
Then comes designing... concrete and brick does not help when defining what you need... What's the budget? Are there materials on the project you can go off of? Is there a certain architectural style you can get cues from? Will it have a cap, a base or pilaster(s) Will it be square? Curved top? What about the cement finish - smooth trowel, acid washed or exposed aggregate? What are your construction skills? If you are subbing this out... are you allowed to? (I think in Texas, you are allowed) If subbing it out, what are the sub-contractors skills. Does it have to be concrete/block/brick?
Options for this type of sign are...
Concrete Pad with mowstrip reinforced with re-bar - Concrete Block with re-bar tried into the base clad with project brick.
Concrete Pad with mowstrip reinforced with re-bar - Poured in place concrete vertical panel with re-bar tried into the base clad with project brick.
Concrete Pad with mowstrip reinforced with re-bar and mounting post(s) - Aluminum Cabinet mounted to posts, exterior rated cement sheeting - (WonderBoard NOT Hardie-Board) attached to face, clad with project brick.
Once you have it designed, Does it require engineering? Usually anything over 6' require a wet stamp engineer drawing set, but you might want to ask your city.
If it were me, I would hire a sign designer to design the sign who knows construction of this type of sign or a masonry company with design sensibilities and knowledge of the Sign Code. Then send out the bid drawing for masonry companies to bid on, getting at least 3 bids - making sure the company is capable of building the thing. Maybe you still have to permit it the structure, but making them responsible may be better - but may add to your costs. Also who will be responsible for DigAlert or issues if any utilities are damaged.
If the design is already done... have a masonry company or sign designer knowledgable with permit submittals to prepare the proper documents. Too many variables to use a "stock" monument drawing.