Below, and in no particular order, is a small list of OSSF Licensed installers I have personally worked with during my tenure with the County of Cooke.
Lake Kiowa Septic
Buckley Septic Systems
Here's a list of Licensed Septic System Cleanout (Pump Trucks).
Electrical and I.T. Consultations -
Scott Manning - 714-326-5356
Master Electrician & I.T. Manager