If it was one company, it would probably read, "Kinsella's chief technology officer" indicating the the person is the chief technology officer OF Kinsella ('s indicating the possessive like 'of' would).
In the example you give, it would have to be Kinsella and AS&E's or something equally unwieldy, and so it was probably changed for simplicity sake, or could just be a typo (I see them in the New York Times all the time).
To include 'the' you would need an 'of' to indicate the possessive, by omitting the 'the' you should have an 's to indicate that the CTO belongs to the companies in question.
A position followed by a company name
I'm not sure about this one, but...
If it was one company, it would probably read, "Kinsella's chief technology officer" indicating the the person is the chief technology officer OF Kinsella ('s indicating the possessive like 'of' would).
In the example you give, it would have to be Kinsella and AS&E's or something equally unwieldy, and so it was probably changed for simplicity sake, or could just be a typo (I see them in the New York Times all the time).
To include 'the' you would need an 'of' to indicate the possessive, by omitting the 'the' you should have an 's to indicate that the CTO belongs to the companies in question.