Convert STL Mechanical Part to STEP

I have a mechanical part currently saved as an STL file and I need it converted to a clean, editable STEP model that will hold up perfectly when I send it out for 3D printing.

Please keep every feature true to the original surface so I can import the STEP into CAD software later without having to rebuild geometry. A watertight solid with no stray facets or inverted normals is essential.

You may use whatever conversion workflow you prefer—SolidWorks, Fusion 360, Inventor, or other professional tools—as long as the final file opens flawlessly in standard STEP-compatible programs.

Deliverable:
• One .step file that matches the source STL and is ready for immediate 3D-print preparation.