HLDSR Engineering LLC
Where quality is excellence and clients are family
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Find the right engineering partner.
Explore capabilities, project experience, and office locations to build your shortlist.
Explore capabilities, project experience, and office locations to build your shortlist.
Where quality is excellence and clients are family
The Future of Waste Treatment
Indianapolis, IN
Mission Critical UxS Integration
Tulsa, OK
Bringing ideas to Reality
Londonderry, NH
Mechanical Contractors & Engineers since 1954
Dothan, AL
Providing professional mechanical, electrical, and plumbing engineering services.
Wallingford, CT
Dedicated to Delivering Sound Engineering Advice
Honolulu, HI
Comprehensive Engineering Solutions
Largest Full-Service Architecture & Engineering Firm in Western MA
Dalton, MA
Mission-Driven Innovation for Defense and National Security
Elevating The Built Environment
Springfield, OR+2
we are the only ones who do what we do
Philadelphia, PA
Powering Engineered Solutions
Monroeville, PA
Innovative and efficient mechanical, HVAC, and plumbing engineering services
Fort Collins, CO+1
Aerospace & Defense Engineering Consultants
Nashua, NH
Accurate and cost-efficient engineering analysis for complex linear and nonlinear problems
Bothell, WA
Engineer. Prototype. Fly.
Alkali metals and chemical process engineering experts
New Freedom, PA
See it. Solve it. Stand by it.
Pocatello, ID
Engineering & Management Solutions
Pittsburgh, PA
Engineering a Sustainable Future with Safe, Innovative Solutions
Naperville, IL
Providing machine design services and contract manufacturing to Silicon Valley, the National Labs and beyond...
Livermore, CA
Multidisciplinary Expertise. Industry Insight.
Scottsdale, AZ+21
Mechanical Engineering and Electrical Engineering.
Columbia