What your boss charged is not...

what they get into their pocket. You might just saw the rate they presented to their client, it is high but that is not their salary. Usually, in civil/structural/geotechnical engineering consulting business. For engineers be paid $100,000 -$160,000, the rate to client would be roughly $120/hour to $180/hour, for PM or EM, the rate will be over $200/hour. Have you done any estimation work of your geotechnical business yet?