Anyone can be a "security engineer" on paper if they get the necessary training... but that doesn't give you the personality that you need for the job. The author does seem to have the personality to some extent... so he should be fine... but I don't think he'll ever be among the best because he did trust someone enough to have a child with them... and he took his child to a public park. That level of trust will seriously hinder his professional development as a security engineer.