In partnership with our clients, we strive to exceed expectations by delivering energy efficient, sustainable MEP designs that are clear, concise, complete, and backed by our motto… Attention to Detail.


Through collaborative relationships, we create sustainable and  inviting spaces where people learn, work and play… doing the things they love, in environments that foster well rounded, fulfilling lives.


Mechanical Design

  • Under Floor Air Distribution System Design
  • Chilled Beam System Design
  • VRF System Design
  • Central Heating / Cooling Plants
  • Indoor Air Quality Studies


Plumbing Design

  • Domestic Water Systems
  • Sanitary Waste Systems
  • Natural Gas Distribution Systems
  • Medical Piping Systems
  • Fire Protection Systems


Electrical Design

  • Site and Building Power Design
  • Interior Lighting Design
  • Exterior Lighting Design
  • Street Illumination Design
  • Low Voltage Design
  • Emergency Power System Design
  • Uninterrupted Power System Design
  • Fire Alarm System Design


Planning & Programming

  • Due Diligence Reports
  • Feasibility Studies
  • Feasibility Assessment
  • Power Quality Studies
  • Electrical Device Coordination Studies
  • Building Load Analysis
  • Electrical Short Circuit Analysis
  • Life Cycle Cost Analysis


LEED Design

  • Green Building & Sustainability Certification/Code
  • Building Performance & Energy Modeling for Early Design and LEED/Code Compliance
  • Passive Design Assessment & Strategies
  • Daylight & Lighting Assessment
  • Life Cycle Cost & Life Cycle Assessment
  • Sustainability & Energy Efficiency Incentive Funding
  • Energy & Water Assessment and Audit



San Antonio-based CNG Engineering, PLLC (CNG) is a professional  mechanical, electrical and plumbing engineering design firm that provides master planning, design and building commissioning services for public and private sector projects across the State of Texas. Since  2004, CNG has provided superior designs that are clear, concise and complete to continuously exceed the client and end users’ expectations.  Our commitment to paying Attention to Detail  has enabled CNG to build a solid reputation in the A/E/C community as an MEP design firm with demonstrated proficiency in the design and planning of municipal/civic, educational, health care and commercial office facilities.


University of Texas System Administration Replacement Office Building

  • 2018 University of Texas System HUB Awards Certificate of Excellence for Outstanding Achievement in Construction

68th Annual San Antonio NAACP Freedom Fund Dinner

  • 2017 City of San Antonio Transportation and Capital Improvements “Designer of the Year” for Mechanical and Electrical Projects

Main Building Restoration  at Our Lady of the Lake University

  • 2014 AIA San Antonio Chapter Mayor's Choice Award
  • 2012 National Trust for Historic Preservations' Preservation Honor Award
  • 2011 San Antonio Conservation Society Award
  • 2011 Associated Builders and Contractors Excellence in Construction
  • 2010 San Antonio Business Journal's Best in Commercial Real Estate: Wild Card - Overcoming Adversity

Alamo Beer Brewery

  • 2015 AIA San Antonio Chapter Honor Award

Austin-Bergstrom International Airport Consolidated Rental Car Facility

  • 2016 Austin Business Journal Commercial Real Estate Awards: Industrial Development

Combined Center for Health Professions, Learning Resources and Student Welcome Center

  • 2010 TASA / TASB Award

Café College

  • 2011 AIA San Antonio Chapter Mayor’s Choice Design Award
  • 2011 Downtown Alliance, Best Educational Facility

Casa Navarro State Historic Site

  • 2012 San Antonio Conservation Society Award

Confluence Park

  • 2020 Chicago Athenaeum American Architecture Award
  • 2019 AIA Institute Honor Award for Architecture
  • 2019 Texas Architect Design Award
  • 2019 Texas ASLA Award of Excellence
  • 2018 AIA San Antonio Honor Award
  • 2018 Architizer A+Awards - Pavilion Category Jury Award
  • 2018 ABC Central Texas Excellence in Construction Award
  • 2016  Texas Architects Studio Award
  • 2016 Texas Society of Architects Studio Award - Unbuilt Category

Jingu House at Japanese Tea Gardens

  • 2012 San Antonio Conservation Society Award

Hemisfair Park  - Yanaguana Garden

  • 2019 Texas ASLA Honor  Award

Mission Branch Library

  • 2016 AIA San Antonio Chapter Honor Award
  • 2015 AIA / ALA Library Building Award
  • 2012 AIA San Antonio Chapter Mayor’s Choice Design Award

Mission Drive-In Marquee

  • 2016 San Antonio Conservation Society Award

Public Safety Headquarters

  • 2013 AIA San Antonio Chapter Mayor’s Choice Design Award

Port San Antonio Building 43 (ACS Call Center)

  • 2010 San Antonio Business Journal's Best in Commercial Real Estate Best Rehab Project

Robert B. Green Campus Clinical Pavilion

  • 2012 Downtown Alliance, Best Work in Progress, Downtown's Best Awards

San Antonio Riverwalk Capital Improvements

  • 2018 San Antonio Conservation Society Award
  • 2014 Downtown Alliance, Best Development / Construction Project, Downtown's Best Awards (Phases 1-3)

San Antonio Riverwalk Capital Improvements - Master Plan

  • 2010 Downtown Alliance, Best Public Improvement Project Work in Progress, Downtown's Best Awards


State of Texas

  • Historically Underutilized Business

North Central Texas Regional Certification Agency

  • Minority Business Enterprise

South Central Texas Regional Certification Agency

  • Small Business Enterprise
  • Minority Business Enterprise
  • African American Business Enterprise
  • Disadvantaged Business Enterprise

City of Austin

  • Minority-Owned Business Enterprise

Texas Department of Transportation

  • Small Business Enterprise

Metropolitan Transit Authority of Harris County

  • Small Business Enterprise