Reinforced Safe Room Build-Out Inside a Closet

We want to convert an existing walk-in closet on the ground floor of our house into a compact reinforced safe room, and we are looking for a contractor with real experience in this kind of hardened interior build. The space is roughly two by two and a half meters, currently used for storage, with a single doorway that will need to be replaced and structurally reinforced.\n\nThe scope includes framing out the interior walls with an additional layer of structural sheathing and steel mesh backing, fitting a heavy steel-core door with a multi-point locking mechanism set into a reinforced frame, and finishing the surfaces so the room still looks and feels like an ordinary closet from the outside. The entrance itself should be disguised — for example behind a false back panel, a sliding shelving unit, or a section of wall that opens on concealed hinges — so a casual visitor would never suspect it is there.\n\nVentilation is a priority: the room needs a quiet, low-profile air supply and exhaust path that keeps the space breathable if the door is closed for an extended period, ideally routed through existing wall or ceiling cavities so no new ductwork is visible from the adjoining rooms. We also want a small conduit run for power and a phone or intercom line, plus interior lighting on a battery backup.\n\nPlease include in your proposal: your prior experience with reinforced doors and hardened wall assemblies, the materials you would use for the wall backing and door frame, how you plan to route ventilation without altering the exterior appearance of the closet, an estimate of the total build timeline, and photos or references from similar completed projects. We would also appreciate a short written plan describing the construction sequence so we understand what to expect during the work. Local candidates preferred, since site visits will be needed before the quote is finalized and periodically during construction to confirm progress and quality.