Corporate Safety
The foundation of all great safety programs is its commitment to training. At R. W. Warner, our safety program includes extensive employee training as well as incident prevention measures and enforcement.
- New Employee Safety Training
- Project Specific Job Hazard Analysis
- Weekly Safety Talks
- 30 Hour OSHA Trained Supervisors
- Substance Abuse Screening Program
- Subcontractor Safety Reviews

Many Companies rely on their Experience Modification Rate (EMR) to judge the effectiveness of their safety program. While we are proud of our industry besting average EMR of .62, we recognize that workplace safety equates to no lost time due to safety failures, which means no schedule delays, no OSHA delays, greater productivity, and ultimatley a more successful project. With over 1,390,000 hours worked over the past three years and a lost time rate of only 1.8, our safety program and our commitment to it is demonstrably superior!

Among the finest compliments one can receive are those from your peers. We are honored to have been recognized for our efforts and remain absolutely committed to building on our success and continuous improvement of our processes while we strive for zero incidents on every project. The results from our commitment speak for themselves, as the company has earned the Association of Builders and Contractors STEP Award for ten straight years!
- 2012 ABC Health & Safety Director of the Year
- ABC Step Platinum Award (2009, 2007, 2005)
- ABC STEP Gold/Silver Award (2013, 2012, 2011, 2010, 2008, 2006, 2004)

FAQs
Find answers to common questions about our services and how we can assist you.
R.W. Warner, Inc. is a family-owned construction and mechanical contracting firm based in Frederick, Maryland, offering plumbing, HVAC, electrical, and general contracting services across multiple industries.
We serve a wide range of industries, including residential, commercial, industrial, institutional, and government sectors. Our team is equipped to handle everything from home services to large-scale mechanical and construction projects.
R.W. Warner, Inc. is located in Frederick, Maryland, where it has maintained a strong presence since its founding. This central location allows the company to efficiently serve clients across Western Maryland, Northern Virginia, and parts of West Virginia, supporting a wide range of residential, commercial, and industrial projects.
Our company comprises several specialized divisions:
- Williams Electric – Electrical contracting services
- Warner Mechanical – HVAC and plumbing solutions
- Warner Construction – General contracting and construction management
- Kaempf & Harris Sheet Metal – State-of-the-art sheet metal fabrication and installation services
Our website serves as a central hub to direct you to the appropriate division. To connect with the appropriate division for your project, please contact us through one of the following methods:
Phone: (301) 662-5387
Email: info@rwwarner.com
Contact: Contact Us
Our team will direct your inquiry to the relevant division, be it Warner Construction, Warner Industrial, Warner Mechanical, Warner Service, or Kaempf & Harris to ensure your project's specific requirements are met efficiently.
Our main office is situated at : 217 Monroe Avenue
Frederick, Maryland 21701 where we coordinate our operations and support projects across the region.

