Commercial Steel Lintel Design for 20ft Opening

I'm seeking an experienced structural engineer to design a steel lintel for a commercial building. The lintel will need to support a sizeable opening of 20 feet, so understanding of load distribution and structural integrity is crucial.

Ideal Skills:
- Extensive knowledge of steel lintel design
- Experience with commercial building structures
- Proficient in structural engineering software
- Must be licensed in Illinois

Please provide examples of similar projects you've successfully completed.