Vendors.
Register as a vendor, download required forms, submit invoices, upload compliance documents, and access purchasing resources in one place.
Everything you need to work with Harper.
Suppliers, subcontractors, and vendors — start with the Vendor Intake Form, then use the resources below to stay compliant and keep invoicing running smoothly.
Vendor Intake Form
Start here. Complete Harper Mechanical's full vendor onboarding: company info, documents, ACH, and certification.
Open FormACH Authorization
Set up direct deposit for faster, more secure payments from Harper Mechanical's accounts payable team.
Open FormInsurance Requirements
Minimum coverage limits and additional insured language for all Harper Mechanical vendors and subcontractors.
Learn MorePurchase Order Terms
Standard purchasing terms & conditions that govern every Harper Mechanical purchase order.
View TermsInvoice Submission
Submit invoices with the matching PO number to accounts payable. Electronic submissions process fastest.
Submit InvoiceThis button opens your default email app. If nothing happens, your device may not have an email client set up. In that case, email arichards@harpermech.net directly with the PO number.
Current Bid Opportunities
Browse active bid opportunities from Harper Mechanical. Bid documents, drawings, and specifications remain available to approved vendors through this portal.
View OpportunitiesResources
Material submittal templates, safety documents, and reference guides for active Harper Mechanical projects.
Learn MoreBecome a Vendor
New to Harper Mechanical? Learn what we look for in supplier partners and how to get on our approved list.
Get StartedQuestions? Talk to us.
For vendor setup, invoice status, or compliance questions, reach our accounts payable and purchasing team directly.