Here is the thing. When you are cleared onto a classified project or given access to classified data, you sign several documents in which you accept responsibility for safeguarding our national security by protecting that information. If an employee of Lockheed Martin engaged in similar behavior, e.g. making references to SCI information outside of a SCIF, with only properly cleared personnel they could go to prison. Regardless of the markings she caused SCI information to be transmitted in the clear which shows a certain level of disregard for the policies that are in place to protect us and it would appear that she did so for her own convenience (if you assume the most pure motives). The reader will have to decide if this behavior, while adjudicated as reckless but not criminal is a simple instance of poor judgement by her handlers or indicative of deeper issues with the candidate.