The Life and Times of Galen Cuvier — a series by Quantum Mechanic

Galen Cuvier is a field engineer providing technical support for customers. His work requires frequent travel, often covering large geographic areas with many service calls in different cities. He's also single, uncommitted, and approaching forty years old. He's had numerous relationships with women, but none of them ever seemed to go anywhere. They usually part as friends. These stories pick up where his life undergoes certain major changes, and in the process, he becomes a Dom.