Electric and Pneumatic Installation Contractors

Hours of Operation: Mon - Fri 8:00am - 8:00pm


We are an Electrical Contractor established in 1967 providing electrical control and power installation to the Maryland and surrounding areas for over 56 years. Our labor force consists of Electricians from Local #24 Baltimore, Electricians from Local #26 Washington DC, and steamfitters from Local #486 Baltimore for pneumatic controls installation and repairs. We provide Industrial and Commercial installation and/or repair of High/medium/low voltage wiring, lighting, low voltage control wiring, pneumatic controls, VFDs, generators, firealarm, security, fiber optics, minor mechanical work, industrial controls design and HVAC controls design.

Deca currently maintains a crew of 75 full time electricians, 2 Steamfitters and 25 vehicles. This insures very prompt service and dependability. The majority of our employees have many years experience in the control and electrical industry. We also have several master electricians on staff. I can confidently say we have some of the top Electricians and Steamfitters in the industry.

Our dedicated and efficient office staff keeps our company very competitive while maintaining a High Quality of Installation for the Customer.


Some of our Projects

Deca Inc is Awarded Controls Installation Contract for Johns Hopkins Hospital

Childrens Medical and Surgical Center CMSC

Deca Inc Controls Installation BWI AB Connector Project

Deca Performs Installation and Startup of ABB VSDS

West Refrigeration/Steam Plant AOC Washington DC

USNA Lejeune Chiller Plant

  • FAA ARTCC Sites Nation Wide Including Guam and Puerto Rico
  • Ft Meade Multiple Projects
  • Multiple VFD Installations and Startups
  • White House HVAC Upgrades
  • Amazon DBA2, DBA3, HBWI HVAC Upgrades
  • BWI DXDY  Building Automation Upgrades
  • BWI Cbis Fire Alarm
  • BWI CUP Upgrades
  • BWI Garage Fiber Network Upgrade
  • Dundalk Marine Terminal
  • NASA Filtration Project
  • AA County Schools Multiple Chiller Replacements Power and Controls
  • VA Chiller Replacement
  • Towson University
  • Aberdeen Proving Grounds Multiple Projects
  • NIH Boilers PLC Upgrade and UPS power
  • Walter Reed Medical Center
  • Social Security Administration Energy Project
  • SSA Metro West 1200KVA Generator Replacement
  • Chilled Water system for Baltimore 
  • Johns Hopkins Hospital
  • Johns Hopkins University
  • NSA Multiple Projects
  • Various Commercial Buildings Power & Mall Store Work
  • Fort Detrick Multiple Projects
  • Northwest Hospital
  • CIA
  • US Navel Academy
  • Oriole Park @ Camden Yards
  • M&T Bank Stadium
  • Various other Government Facilities


Company History

Established in 1967, Wendell Petri (Pete) and William Ruley (Bill) purchased David E. Crook Association and reorganized as DECA Inc. Pictured below in September of 1976, on the date of purchase of the 6511 Harford Road Office.    (Left to right) 

                      Wendell Petri (Pete), Debbie Ruley , William Ruley

Left to Right Wendell Petri, Debbie Ruley, William Ruley

Current Deca Location @ 6501 Harford Road Built in 2002-2003

Whats New 

       Steven Petri Sr Elected                          National NECA 

          District II Vice President                           and Inducted into the                           Academy of Electrical                                     Contracting

Deca Inc Earns NECA Safety Honors

The Safety Exellence Awards are one of NECA's premier recognition programs, and acknowledges member contractors' annual safety performance. Winners are selected based on their comparison to BLS data and electrical contractors. This Year, DECA Inc. earned recognition within NECA's District II as "Zero Injury" Award Winner. Congradulations to DECA for This Acievement and continued excellence in not only electrical contracting but also the safe work practices that you have cultured over the years.

Deca Receives DOD Patriotic Employer Award for supporting Participation on                              America's National Guard and Reserve Force

Deca Inc. Participates in Annual CCF Maryland NECA Golf Charity Event

FAA Air Route Traffic Control Center HVAC Controls Upgrades Projects.
Miami, Jacksonville, Chicago, Kansas City, Fort Worth, Houston, Albuquerque, Anchorage,Long Island, Cleveland

Corporate Information

Steven M. Petri Sr

Wendell A. Petri
Vice President/CFO

Peter F. Raab Jr.
Sr. Project Manager/ Company Officer

Mike Mcquay:
Project Manager/ Company Officer

Steven Petri Jr
Project Manager/
Company Officer/ Master Electrician

Chris Neuman

Project Manager/Estimator

Daneen Bancewicz


Charmaine Johnson

Administrative Assistant

Licensing Information: Maryland, Virginia, West Virginia, Washington DC, Delaware

D&B #: 46281580