Make a Payment
Pay with a Electronic Check (ACH) or a Credit Card. A 3.99% non-cash adjustment is applied to credit card payments.
We have a $25,000 ACH limit and a $10,000 Credit Card limit. (no minimums)
Please have your job description and invoice number ready.
On Site Structural Engineering does not collect any data from their customers. The payment page is secure and encrypted for our customers protection. If a refund is required for overpayment or to return unused retainer funds, On Site Structural will issue refund via check.
To Pay by check: write to On Site Structural Engineering LLC and mail to
1499 W 120th Ave, Suite 110, Westminster CO 80234
For billing related questions, please contact your project manager or email us at billing@ossengr.com