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NAICS 541330 · Engineering Services

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Engineering firm in Downers Grove, IL

24 engineering firm in Downers Grove, IL; 1,073 within 30 miles. Every listing checked against the issuer's record, in the published order.

  1. Gasperec Elberts Consulting LLC

    ActivePartnership or limited liability partnership registered in SAM.gov

    Downers Grove, IL

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    Proof for Gasperec Elberts Consulting LLC
    SAM.gov registration
    SAM.gov VNXGYK9WSGY7
    Issuer
    SAM.gov
    Status
    Active
    Class
    Partnership or limited liability partnership registered in SAM.gov
    Expires
    Feb 6, 2027
    Checked
    Oct 23, 2026
    Where
    Downers Grove, IL · serves Illinois
    Phone
    (847) 868-1830
    Listing
    Built from public records. Not claimed yet, so call them directly.
    Proof → SAM.gov record

  2. Rjn Group Inc

    ActiveTax-exempt corporation registered in SAM.gov

    Downers Grove, IL

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    Proof for Rjn Group Inc
    SAM.gov registration
    SAM.gov M67MQ3HKF271
    Issuer
    SAM.gov
    Status
    Active
    Class
    Tax-exempt corporation registered in SAM.gov
    Expires
    Jan 28, 2027
    Checked
    Oct 23, 2026
    Where
    Downers Grove, IL · serves Illinois
    Phone
    (630) 682-4700
    Listing
    Built from public records. Not claimed yet, so call them directly.
    Proof → SAM.gov record

  3. Amsco Engineering, Inc., Amsco Engineering Inc

    ActiveCorporation registered in SAM.gov

    Downers Grove, IL

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    Proof for Amsco Engineering, Inc., Amsco Engineering Inc
    SAM.gov registration
    SAM.gov X1JBECDYJQ44
    Issuer
    SAM.gov
    Status
    Active
    Class
    Corporation registered in SAM.gov
    Expires
    Mar 26, 2027
    Checked
    Oct 23, 2026
    Where
    Downers Grove, IL · serves Illinois
    Listing
    Built from public records. Not claimed yet, so call them directly.
    Proof → SAM.gov record

  4. Kiran Consultants Inc.

    ActiveCorporation registered in SAM.gov

    Downers Grove, IL

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    Proof for Kiran Consultants Inc.
    SAM.gov registration
    SAM.gov P217VNM1N979
    Issuer
    SAM.gov
    Status
    Active
    Class
    Corporation registered in SAM.gov
    Expires
    May 7, 2027
    Checked
    Oct 23, 2026
    Where
    Downers Grove, IL · serves Illinois
    Listing
    Built from public records. Not claimed yet, so call them directly.
    Proof → SAM.gov record

  5. Middough Inc

    ActiveCorporation registered in SAM.gov

    Downers Grove, IL

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    Proof for Middough Inc
    SAM.gov registration
    SAM.gov XKBUNJTJ1KZ5
    Issuer
    SAM.gov
    Status
    Active
    Class
    Corporation registered in SAM.gov
    Expires
    Apr 10, 2027
    Checked
    Oct 23, 2026
    Where
    Downers Grove, IL · serves Illinois
    Listing
    Built from public records. Not claimed yet, so call them directly.
    Proof → SAM.gov record

  6. Hendron Michael a

    ActiveSole proprietorship registered in SAM.gov

    Downers Grove, IL

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    Proof for Hendron Michael a
    SAM.gov registration
    SAM.gov VMJDBGMTMMH5
    Issuer
    SAM.gov
    Status
    Active
    Class
    Sole proprietorship registered in SAM.gov
    Expires
    Nov 10, 2026
    Checked
    Oct 23, 2026
    Where
    Downers Grove, IL · serves Illinois
    Listing
    Built from public records. Not claimed yet, so call them directly.
    Proof → SAM.gov record

  7. Wgi, Inc

    ActiveCorporation registered in SAM.gov

    Downers Grove, IL

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    Proof for Wgi, Inc
    SAM.gov registration
    SAM.gov XA49GPT52PR6
    Issuer
    SAM.gov
    Status
    Active
    Class
    Corporation registered in SAM.gov
    Expires
    Aug 4, 2027
    Checked
    Oct 23, 2026
    Where
    Downers Grove, IL · serves Illinois
    Listing
    Built from public records. Not claimed yet, so call them directly.
    Proof → SAM.gov record

  8. Ames Engineering Inc

    Engineering firm

    Downers Grove, IL

    CallAsk it
    Proof for Ames Engineering Inc
    Where
    Downers Grove, IL · serves Illinois
    Phone
    (630) 737-1987
    Listing
    Built from public records. Not claimed yet, so call them directly.

  9. Burns & McDonnell

    Engineering firm

    Downers Grove, IL

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    Proof for Burns & McDonnell
    Where
    Downers Grove, IL · serves Illinois
    Phone
    (630) 724-3200
    Listing
    Built from public records. Not claimed yet, so call them directly.

  10. Inservice Engineering

    Engineering firm

    Downers Grove, IL

    CallAsk it
    Proof for Inservice Engineering
    Where
    Downers Grove, IL · serves Illinois
    Phone
    (630) 985-5454
    Listing
    Built from public records. Not claimed yet, so call them directly.

  11. Jacob And Hefner Associates

    Engineering firm

    Downers Grove, IL

    CallAsk it
    Proof for Jacob And Hefner Associates
    Where
    Downers Grove, IL · serves Illinois
    Phone
    (630) 652-4600
    Listing
    Built from public records. Not claimed yet, so call them directly.

  12. Merkur Innovation

    Engineering firm

    Downers Grove, IL

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    Proof for Merkur Innovation
    Where
    Downers Grove, IL · serves Illinois
    Phone
    (877) 571-0222
    Listing
    Built from public records. Not claimed yet, so call them directly.

  13. Millennia Professional Services

    Engineering firm

    Downers Grove, IL

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    Proof for Millennia Professional Services
    Where
    Downers Grove, IL · serves Illinois
    Phone
    (630) 705-0110
    Listing
    Built from public records. Not claimed yet, so call them directly.

  14. MKA International, Inc. (MKA Chicago)

    Engineering firm

    Downers Grove, IL

    CallAsk it
    Proof for MKA International, Inc. (MKA Chicago)
    Where
    Downers Grove, IL · serves Illinois
    Phone
    (312) 627-0900
    Listing
    Built from public records. Not claimed yet, so call them directly.

  15. St. John-mittelhauser & Associates, A Terracon Company.

    Engineering firm

    Downers Grove, IL

    CallAsk it
    Proof for St. John-mittelhauser & Associates, A Terracon Company.
    Where
    Downers Grove, IL · serves Illinois
    Phone
    (618) 216-3434
    Listing
    Built from public records. Not claimed yet, so call them directly.

  16. Tkda

    Engineering firm

    Downers Grove, IL

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    Proof for Tkda
    Where
    Downers Grove, IL · serves Illinois
    Phone
    (630) 499-4110
    Listing
    Built from public records. Not claimed yet, so call them directly.

  17. Zachry Engineering

    Engineering firm

    Downers Grove, IL

    CallAsk it
    Proof for Zachry Engineering
    Where
    Downers Grove, IL · serves Illinois
    Phone
    (630) 963-5800
    Listing
    Built from public records. Not claimed yet, so call them directly.

  18. Ambitech

    Engineering firm

    Downers Grove, IL

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    Proof for Ambitech
    Where
    Downers Grove, IL · serves Illinois
    Listing
    Built from public records. Not claimed yet, so call them directly.

  19. Command Ventilation Group

    Engineering firm

    Downers Grove, IL

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    Proof for Command Ventilation Group
    Where
    Downers Grove, IL · serves Illinois
    Listing
    Built from public records. Not claimed yet, so call them directly.

  20. G C Engineering

    Engineering firm

    Downers Grove, IL

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    Proof for G C Engineering
    Where
    Downers Grove, IL · serves Illinois
    Listing
    Built from public records. Not claimed yet, so call them directly.

More cities in Illinois

Chicago 343Naperville 49Schaumburg 34Lisle 31Springfield 29Rockford 26Elk Grove Village 25Aurora 24Elgin 24Peoria 23Arlington Heights 16Northbrook 16St. Charles 16Champaign 15Lombard 15Oak Brook 14

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