1991: "Top 25 Small Businesses," St. Louis RCGA

1956: 1st St. Louis County roadway project

1933: Firm founded as "W.W. Horner, Consulting Engineer"

1992: Firm begins role as MidAmerica Program Manager

2000: Illinois office relocated to Fairview Heights

1958: H&S co-founder Wesley W. Horner dies

1969: 4th (current) office location at 5200 Oakland Ave., St. Louis

1955: H&S co-founder Hymen Shifrin dies

1943: Firm renames "Horner & Shifrin, Consulting Engineers"

2004: ACEC-Mo's honor Award for Festus-Crystal City wastewater treatment plant

1933: Washington (DC) National Airport Drainage Project

1998: H&S adopts Corporate Vision Statement

2006: Merged “Lester-Buehler, Inc.,” an M/E/P engineering firm with H&S

2005: Illinois office relocated to O'Fallon

1989: National Feasibility Study for Interstate 66

1935: Firm renamed "W.W. Horner & H. Shifrin, Consulting Engineers"

1958-73: Erwin "E.E." Bloss serves as 2nd President

2001: James P. Kirkwood Bridge replacement named an APWA National Public Works Project of the Year

1973-88: Ervin Breihan serves as 3rd president

1963: Civil design for Northwest Plaza, world's largest mall at the time

1976: Established "H&S Scholarship in Engineering" at Washington University

1958: 1st Lambert Field project

1933-58: Wesley Horner serves as 1st president

1992: Patented Multiport Diffusion System for Rock River Water Reclamation Dist., Rockford, IL

1934-42: 2nd office at 1325 International Office Bldg., St. Louis

2001: "Top 20 Best Civil Engineering Firms to Work For," C.E. News

1978: Acquired “Leonard Rich, Inc.,” an M/E/P engineering firm

1963: 1st use of computers at H&S

1996: 1st MetroLink project begins

1949: 1st Missouri State Highway Dept. (now MoDOT) project

2006: ACEC-Mo Grand Award for Grossman Mega-Shredder project

1966: 1st H&S-designed wastewater treatment plant for Metropolitan St. Louis Sewer District

1966: Firm renamed “Horner & Shifrin, Inc.”

1954: Assisted in formation of Metropolitan St. Louis Sewer District

2007: H&S becomes an “S” Corporation

1988-2004: Len Kirberg serves as 4th president

1942-69: 3rd office location at 1221 Locust St., St. Louis

1997: Established "H&S Endowed Scholarship Fund" at Univ. of MO-Rolla

2007: H&S designs major segment of $525-million New I-64 project

1986: Designed Missouri Research Park

2005: Merged "Alternative Engineering, Inc.," and M/E/P engineering firm with H&S

1933-34: 1st office was in Wesley Horner’s attic at 5842 Julian Ave., St. Louis

1998: Acquired "Creative Consulting Engineers," and M/E/P engineering firm

1983: 1st Illinois Department of Transportation project

2003: National Council of Structural Engineers Assoc.'s "Outstanding Project Award" for Stacy Park Reservoir Seismic Retrofit project

1983: Designed first earth-compacted retaining wall in St. Louis

1942: Fort Leonard Wood (MO) infrastructure design project

2002: Established Civil Engineering Scholarship at SIU—Edwardsville

1975: Received Corps of Engineers' Distinguished Design Award for flood protection project

1968: Civil design for 1,200-acre Earth City development

1987: H&S Becomes an ESOP firm

1972: Pioneered Trash-to-Energy prototype with Union Electric Co.

2004: “Top Five Largest Engineering Firms in St. Louis,” St. Louis Business Journal

1988: Illinois office established in Belleville

1994: 1st MIOX water disinfection system in Collinsville, IL

2004: Bill Clarke serves as 5th president

1993: St. Louis Floodwall (H&S project) withstands "Great Flood of 1993"

1984: "Presidential Design Award" (Federal Design Achievement Award) for St. Louis Flood Protection Project