A & S Engineers, Inc.
San Francisco, CAFull-service Mechanical, Electrical, Plumbing Engineering and Commissioning Firm
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Full-service Mechanical, Electrical, Plumbing Engineering and Commissioning Firm

Blue-Sky to Reality
Designs for Automation, Prototypes and Product Engineering

Harmonizing Relationships, Sustainability and Innovation
A Higher Standard of Engineering & Design

Building commissioning and retrocommissioning services
From napkin sketches to production, delivering mechanical engineering and industrial design to bring complex products to market.
Engineering Services, Software, Hardware, Systems

Engineering Excellence with Comprehensive Full Service Solutions
Mechanical and electrical engineering for buildings, industrial facilities, and process systems
Delivering Intelligent Engineering
Custom process equipment and industrial automation solutions

Thoughtful Engineering. Shared Success.
Manufacturing commercial products in a microgravity environment.

Solving Complex Challenges in Design, Compliance, and Litigation

Engineering Excellence in Every Pipe: Where Stress Meets Expertise.

Consultation and Engineering Services

Engineering Creative Solutions

Northwest Engineering Service, Inc. (NWESI) is an independent third-party provider of testing, adjusting, and balancing (TAB), commissioning, retro-commissioning, and energy services for building systems. With decades of hands-on experience, NWESI ensures that facility HVAC, energy, and water systems perform as designed, offering specialized services including building envelope testing, fire smoke damper testing, cleanroom performance testing, and semiconductor tool efficiency programs across the Pacific Northwest.
Providing machine design services and contract manufacturing to Silicon Valley, the National Labs and beyond...

High Fidelity Engineering

Prince Engineering, Inc. is a consulting engineering firm specializing in process, piping, and HVAC system analysis and design for industrial clients. Founded in 1998 and based in Greenville, SC, the firm serves industrial clients, construction companies, equipment manufacturers, and engineering consultants across the Southeast. Its design team carries over 140 years of combined experience in industrial process, piping, and HVAC design.

Optimizing Energy Efficiency, Enhancing Performance
Pyramid EES brings over three decades of expertise and experience in the built environment with a proven track record in Creativity, Innovation, Delivery, and Excellence through its founder and principal energy engineer, Mr. Khaled A. Yousef, PE. Mr. Yousef is responsible for providing technical assistance services to multiple customers for existing and new facilities during all project development phases. He has over thirty years of comprehensive building HVAC/energy systems experience in energy engineering, efficiency, audits, commissioning, measurement and verification, demand side management, and advanced biomass heating systems.