Hood Patterson & Dewar

Hood Patterson & Dewar Full service electrical & mechanical testing & commissioning firm providing 3rd-party services

Hood Patterson & Dewar (HP&D) is a customer-driven, employee-owned collaborative team of engineers, technicians, and service professionals, offering:
• Electrical, mechanical and integrated systems commissioning
• Electrical component testing
• Quality assurance and control (QA/QC) services
• Engineering consulting
• Grounding system design and assessment
• Power system studies
• Safety asses

ments and training

Established in 1982, HP&D remains widely regarded as an industry leader. Clients repeatedly depend on HP&D to assist with projects of any size, from small commercial buildings to large state-of-the art data centers, industrial plants, and mission critical facilities. HP&D is a wholly-owned subsidiary of Patterson & Dewar Engineers, Inc. (pdengineers.com), which has specialized in designing and evaluating vital electrical infrastructures for electric utilities since 1947. Together, P&D and HP&D share an unyielding commitment to preserving our tradition of excellence and integrity.

We're looking for team players who are enthusiastic about learning, growing, and excelling.
09/02/2026

We're looking for team players who are enthusiastic about learning, growing, and excelling.

One small air gap at medium voltages can lead to costly equipment damage. In our latest blog, Brandon Sedgwick, PE, shar...
08/26/2026

One small air gap at medium voltages can lead to costly equipment damage. In our latest blog, Brandon Sedgwick, PE, shares a real-world VLF testing lesson that shows why proper setup, active monitoring, and disciplined procedures matter.


https://hoodpd.com/vlf-testing-failure/

During New Employee Boot Camp, new team members explore our organization’s history, culture, and core values, highlighti...
08/20/2026

During New Employee Boot Camp, new team members explore our organization’s history, culture, and core values, highlighting what has driven our success over the past 78 years.

At HP&D, our exceptional team is our greatest asset! With a vibrant mix of talents and a common vision, we celebrate you...
08/12/2026

At HP&D, our exceptional team is our greatest asset! With a vibrant mix of talents and a common vision, we celebrate your unique ideas and entrepreneurial spirit. Join us and flourish in a dynamic environment where you can make a difference!

Bad ground testing leads to bad data. In data centers, missing key steps in fall of potential testing can create false r...
07/29/2026

Bad ground testing leads to bad data. In data centers, missing key steps in fall of potential testing can create false results, costly delays, and real risk. This article breaks down common mistakes—and what it takes to get grounding tests right.

DATA CENTER GROUND TESTINGThe fall of potential (FoP) test to measure the ground impedance of a data center building or substation is commonly specified as part

Ground testing accuracy depends on more than equipment—it requires sound methodology, trained operators, and transparent...
07/22/2026

Ground testing accuracy depends on more than equipment—it requires sound methodology, trained operators, and transparent data validation.

Ground testing accuracy depends on more than equipment—it requires sound methodology, trained operators, and transparent data validation.

Our engineers provide insights from arc flash analysis to voltage drop studies. Strengthen your electrical system with H...
07/15/2026

Our engineers provide insights from arc flash analysis to voltage drop studies. Strengthen your electrical system with HP&D. Learn more:

Our Powers Systems Studies Group (PSSG) offers comprehensive power system analysis and reporting with practical and useful results and recommendations.

07/04/2026

Address

Atlanta, GA

Telephone

(770) 453-1415

Website

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