It’s important that you always leave the construction interview with an answer to two questions, "When will you be making your decision?" and "When can I expect to hear from you?" Always send a follow up thank you note to the people you construction interviewed with, and include some information that reinforces your interest in the position, your most attractive skills or attributes for being a qualified construction executive, and some information that communicates you were paying attention to that particular construction interviewer. It’s not uncommon for companies to take weeks to get back with construction executives for second construction interviews. This all depends on how many construction executives they want to construction interview for the first round, and how smoothly the scheduling of these construction interviews goes. You should not follow up aggressively with phone calls to the construction interviewers, however it is appropriate to call them once the date has passed when they said they would contact you. Chances are if you have been identified as a construction executive for second round construction interviews, they will follow up as they indicated in the construction interview. If not, it’s unlikely that they will change their mind regardless of your phone calls or follow up letter. If you have already made the call and no one has returned it, you can assume they are not interested in pursuing you for a second round construction interview. I suggest you move on.