About U&R: Principals

Credentials & Over 30 Years of Experience

Whether your project is large or small, a senior expert at U&R will plan and manage it. At every stage your project will benefit from our experience, knowledge and out-of-the-box problem-solving creativity.

Frank M. Rosenblum, PE, PLS
President & Principal Engineer

Frank M. Rosenblum
Expertise and Experience:
Mr. Rosenblum brings more than 30 years of experience in civil engineering design and land surveying. He has worked on all types of private and municipal site development projects. With thousands of school projects in more than 50 California school districts, his expertise remains unmatched in the areas of school facilities planning, design and rehabilitation. Mr. Rosenblum has a deep commitment to working on mid-sized projects and helping to improve schools.
  • California Registered Civil Engineer No. 42857
  • California Registered Land Surveyor No. 6395
  • BS in Civil Engineering, California Polytechnic State University, San Luis Obispo
  • Technical degree in surveying, City College of San Francisco

David B Voorhies, PE
Principal Engineer

David B. Voorhies
Expertise and Experience:
Mr. Voorhies brings more than 40 years of civil engineering experience. He has worked on many prominent planned communities, residential, public and commercial developments. His responsibilities include project planning, conceptual design, hydraulic studies, surveying and mapping, environmental and design studies, grading and improvement design, plans and specification preparation, and construction management. Specializing in difficult, high-density infill projects requiring creative solutions, he has provided engineering for apartment buildings, condominiums, townhouses, single-family and senior housing.
  • California Registered Civil Engineer No. C26429
  • BS in Civil Engineering, Washington State University, Pullman, Washington
  • QSD/QSP Certified
  • LEED AP Certified

Additional Key Personnel

Additional key personnel working on Underwood & Rosenblum, Inc. projects include our design engineers, computer drafters, field survey crews and administrative staff. They are chosen based on their college degrees, professional experience, competence, integrity and dedication to customer service.