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About US

Contigo Engineering, LLC is a woman-owned, civil engineering firm based in Bartlett, Illinois that specializes in hydrologic and hydraulic modeling, mapping and permitting.

The company was founded by Jenny Loewenstein, P.E., CFM, CPESC, who has over 20 years of experience in the engineering design field and is highly qualified in various H&H software programs, including FEQ, HEC-RAS, XPSWMM, EPASWMM, HY-8, HEC-HMS and WinTR-20.

Jenny founded Contigo Engineering, LLC with the goal of establishing a woman-owned engineering firm that could deliver engineering design, modeling and permitting support for prime consultants. With her extensive experience in the industry, she saw a need for a company that could deliver top-notch subconsultant engineering services in the Chicagoland area.

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Our Services


H&H Modeling

  • Site Specific Floodplain Studies

  • Hydraulic Structure Modeling

  • Floodway Modeling

  • Urban Flooding Studies

  • Letter of Map Revisions Based on Modeling (C/LOMR)


Illinois & Chicagoland Stormwater Permit Submittals

  • Floodway Construction Permits (IDNR)

  • Local & County Stormwater and Floodplain Submittals (e.g. DuPage County, MWRD)

  • IDOT PBDHR (Hydraulic Reports)



  • Introduction to Applicable Engineering skills for Entry Level Design Engineers (1 Day to 6 Day Courses offered)

  • H&H Quality Assurance and Quality Control (QA/QC) Reviews (On Call or Project Based)

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Certifications and Licenses

Certified Women Business Enterprise (WBE) with the Metropolitan Water Reclamation District of Greater Chicago (MWRD)

Licensed Professional Engineers in Illinois and Indiana.

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