For one year I worked with a consultant who covers an important role for a company I would like to work for.
He would most likely be working with anyone who takes one of these open positions. I have worked very closely with this person, and he knows me very well. His work with my company is defined by an NDA.
I am afraid that my application could reach his desk and in order "to protect the interests" of my company, he might feel the compelled to confide to my boss that I applied for a job in his company.
He knows that if I left my company, it would cause trouble for them. On the other hand, if he thinks I am worthy enough for his company he might recommend they hire me.
I think he might also respect the interests of his company by not informing my boss to let me complete the hiring process.
What realistic concerns might I have if my application comes to his attention.
Since one year we are in NDA with a consultant covering an important role for a company I would like to apply for a job
Try as I might, I cannot parse this sentence. Could you elaborate?