The phrase "senior officers" refers to individuals in higher-ranking positions within an organization or group. They have more authority and responsibility compared to lower-ranking officers or employees. Full definition
And it had to take two very senior officers of the ruling party to go and organise people to lock up the offices of a sitting government. (citifmonline.com)
«Now I'm not going to say it was the chief, but you had several senior officers that would do things that I would question ethically,» he says. (canadianlawyermag.com)