HVAC
Air conditioning, refrigeration, heating, and ventilation systems engineered for efficiency, comfort, and long-term operating economy.
Since 1949 · Little Rock, Arkansas
Arkansas's oldest MEP
consulting engineering firm.
Mechanical, plumbing, electrical, and fire protection design across more than 6,000 projects — from state buildings and university campuses to K–12 schools, hospitals, and civic landmarks.
76+Years in practice
6,000+Completed projects
StatewideArkansas coverage
LEED APAccredited staff
Practice areas
A full-service MEP consulting practice.
We handle every aspect of a building's MEP systems — from air conditioning to fire protection to data infrastructure — using modern modeling tools and decades of institutional experience.
Plumbing
Domestic water, sanitary, storm, and specialty piping design across commercial, institutional, and healthcare projects.
Electrical
Power distribution, lighting, communications, and life-safety systems for buildings of every scale and use.
Fire Protection
Sprinkler, standpipe, and specialty suppression design coordinated with local AHJ requirements and NFPA standards.
Energy Modeling
Whole-building energy analysis to inform envelope, system selection, and operating-cost forecasting — LEED-friendly.
BIM
Integrated MEP modeling and coordination with the architect's Revit environment. Clash detection and constructible documents.
Three generations of practice
From ink on linen to Revit BIM.
Seven decades of MEP engineering — and every leap in how buildings get drawn, coordinated, and delivered. The tools change. The standard of care doesn't.
1949Ink on linen. Cyanotype prints.
The firm's first drawings were hand-drafted, blueprinted, and coordinated across trades on the drafting board — one sheet at a time.
1980sAutoCAD. Vector precision.
Computer-aided drafting arrived and the sheets got sharper. Duct sizing, panel schedules, and pipe routing became digital-native — faster to revise, easier to coordinate.
TodayRevit BIM. Clash-free delivery.
Every project is now modeled in three dimensions alongside the architect — services coordinated, clashes resolved, and documents constructible before a single trade breaks ground.
Selected work
Institutional buildings across Arkansas.
State agencies, public school districts, universities, and civic institutions rely on Pettit & Pettit for MEP design that performs on day one and stays affordable to operate for decades.
State Government
Arkansas Justice Building
Civic
State House Convention Center Atrium
Higher Education
Harding University Chilled Water Plant
Municipal
Little Rock Police Department
K-12 Education
Dr. Don R. Roberts Elementary
Higher Education
ASU / NYIT
The firm
A three-generation Arkansas engineering practice.
Pettit & Pettit was founded in 1949 by Ernest N. Pettit, Jr. and his son Kent A. Pettit. Today the firm is led by Donald R. Huggins, P.E. (President), Tony D. Aycock, P.E. (Vice President), and principals Terry J. Jacks, P.E. and Marcus D. Cathey, P.E.
We're registered professional engineers, engineer interns, senior designers, and LEED-accredited staff. Roughly a third of our work is renovation and retrofit — knowledge of existing construction, budgets, and long-term operating economy is what lets us deliver projects that stay on budget and stay efficient.
About the firmHave a project on the boards?
Whether you're an architect building a design team, a general contractor pricing a proposal, or an owner planning a renovation — we'd like to hear about it.