Moving a stairwell - need Residential Structural Analysis with stamped and sealed calculations for permit submittal

I’m moving forward with a residential remodel and need a Missouri licensed professional. I need structural engineer or architect to provided calculations on a stairwell relocation in St Louis County MO. Stairwell is currently on one side of the main beam, and we are moving to the other side of the beam. Your role will start with reviewing the current DWG drawings, confirming loads, and producing all necessary structural loads on a stairwell relocation.

I can easily make I can make all necessary changes to the DWG drawings per your request. The note from St louis County Building Department states:
New Stair Opening
Building
Created by: Laura on 4/14/2026, 1:32:34 PM
Reference:
Description:
Provide structural calculation (signed and sealed by Missouri registered design professional) for new stair opening framing in the existing floor.
* Requires modifications to be submitted
Answered

I’m happy to answer questions quickly, provide site photos, and schedule a call if something doesn’t add up. Must be licensed as a structural engineer or architect and able to seal in Missouri and specifically in St Louis County MO. Attached is the set of prints and A5 is the page flagged by the county during the review

Deliverables I must receive to sign off:
• Full structural calculation report stamped (PDF)
• Construction-ready structural drawings (DWG + PDF)
• Brief design summary outlining key assumptions, loads, and materials

I’d like to get a proposal and an estimated timeline. No communication outside of freelancer.