Are there any municipal infrastructure design firms that focus on concept through detailed design for public works projects?

Yes — there are many firms that do exactly that.

What you’re describing is typically called municipal infrastructure design, public works engineering, or civil engineering design services. Firms in this space often handle the full project lifecycle from:

• concept planning / feasibility
• preliminary engineering
• detailed design
• permitting
• bidding support
• construction administration

Common public works project types include:

• roads and streets
• water mains and distribution
• sanitary sewer and stormwater
• drainage and flood control
• bridges and culverts
• sidewalks, trails, and streetscapes
• municipal utility upgrades
• site civil for civic facilities

Examples of firms with strong municipal/public works practices include:

• Stantec
• AECOM
• HDR
• WSP
• Gannett Fleming
• Kimley-Horn
• Kleinfelder
• RS&H
• Civil & Environmental Consultants (CEC)
• Foth
• Burgess & Niple

There are also many regional and local civil engineering firms that focus heavily on city, county, and utility work, often offering more hands-on service than large national firms.

If you want, I can also help you find:

1. firms by region/state,
2. boutique municipal design firms, or
3. a shortlist based on a specific public works type like water, transportation, or stormwater.