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Business Details
50+ Years
experience
Mechanical Electrical Plumbing Engineering Design
Founded in 1974, Custom Engineering has established itself as a leader in mechanical, electrical, and plumbing system design for commercial and industrial projects. Our team of licensed professionals delivers energy-efficient solutions compliant with building codes and owner specifications, serving clients nationwide from 39 states plus DC. With LEED-certified experts and cutting-edge technology like variable frequency drives, we prioritize sustainability while maintaining strict adherence to project timelines and budgets.

Our MBE/DBE certifications and decades of federal contract experience demonstrate our commitment to diversity and excellence. As a client-focused firm, we provide single-point project continuity and leverage cross-disciplinary collaboration to tackle projects ranging from small renovations to multi-million-dollar facilities.
Services
Electrical Design Plumbing Systems HVAC Design LEED Certification Commissioning Lighting Design IT Infrastructure Sustainable Design
Details
  • Year established: 1974
Highlights and features
  • We offer 50+ years of combined engineering experience across 39 licensed states
  • Our team includes LEED Accredited Professionals with specialized sustainability expertise
  • We provide nationwide service with local office support in Missouri and Kansas
  • We maintain MBE/DBE certifications for government contracting compliance
  • Our single-point project continuity ensures consistent communication and quality control
Associations and certifications
  • LEED AP BD+C
  • SDBE
  • MBE
  • DBE
What people say
Excellent design services Great job Outstanding work Flexible approach Wow factor
Services
Electrical Design
Our electrical engineering services cover complete power system design for commercial and industrial facilities. We specialize in transmission and distribution systems, emergency power solutions, and code-compliant installations. Our engineers deliver efficient electrical infrastructure that meets current and future facility needs while maintaining strict safety standards.
LEED Certification
We provide LEED-certified design solutions that help clients achieve sustainability goals and energy efficiency targets. Our USGBC-certified professionals implement strategies for energy conservation, water efficiency, and indoor environmental quality. Our designs have contributed to multiple LEED Gold and Silver certifications across diverse project types.
HVAC Design
Our HVAC solutions combine energy efficiency with occupant comfort for commercial and industrial spaces. We design systems that meet ASHRAE standards while optimizing energy performance. Our expertise includes variable refrigerant flow systems, geothermal heating, and specialized climate control for sensitive environments.
Commissioning
We offer comprehensive commissioning services to verify building systems perform according to design specifications. Our certified commissioning agents ensure mechanical, electrical, and plumbing systems operate efficiently from project completion through ongoing operations.
Lighting Design
Our lighting solutions balance aesthetics with energy efficiency using the latest LED technology and smart controls. We create lighting plans that enhance architectural features while meeting IESNA illumination standards and energy code requirements for various commercial applications.
People
Joseph T. Davis
Chief Executive Officer
Joseph T. Davis leads Custom Engineering with over 13 years of industry experience from 3M Company. He oversees project delivery, client satisfaction, and business development while managing federal contracts with agencies like the Veterans Administration and US Army Corps of Engineers.
Questions
What engineering disciplines do you specialize in?
We specialize in mechanical, electrical, plumbing (MEP), lighting, and low-voltage systems design for commercial and industrial projects.
Are you certified for government contracts?
Yes, we hold MBE/DBE certifications through multiple state and federal agencies including the SBA and USDOT.
Do you offer LEED-certified design services?
Yes, we have LEED Accredited Professionals on staff and have completed over 20 LEED-certified projects.
What geographic areas do you serve?
We operate nationwide with offices in Missouri, Kansas, and Illinois, licensed in 39 states plus DC.
What industries do you work with?
We serve aviation, healthcare, education, government, transportation, and commercial sectors with specialized engineering solutions.
Do you provide commissioning services?
Yes, we offer full commissioning services with a certified commissioning agent on staff for system validation.