40 years of ingenuity, safety and results.
Born in Marietta, Ohio in 1986. Stronger in 2026. Mole·Master® Services Corporation has spent four decades building the industry leader in no-entry silo and bin cleaning, project after project, industry after industry.
The leader in silo and bin cleaning: for over four decades.
For more than 40 years Mole·Master® has led the global silo and bin cleaning industry, providing services across the United States and in 35+ countries worldwide. We continue to innovate in cleaning processes, equipment design, manufacturing and testing, all from our headquarters in Marietta, Ohio.
In addition to our Ohio headquarters, we operate a west-coast equipment depot in California for customers along the Pacific. We also provide rapid-deployment domestic and international service through specialized containerized equipment that ships directly to job sites.
Wherever you need us, fast: with fleets available from multiple locations and a 24/7 answering service, a Mole·Master® crew can be on the road to you in as little as two hours, subject to crew availability.
Highest quality. Highest safety. Lowest total cost.
Mole·Master® provides the highest quality professional services available, combining highly trained technicians with the most technologically advanced equipment in the industry. The result is the safest and most cost-effective solution for any unwanted material build-up, regardless of vessel type or size.
- Proprietary Big·Mole® technology handles any vessel, any material
- Engineers with decades in-field, continuously re-trained
- Communication-led project model: planning stage, implementation stage, full visibility throughout
- One objective: get your facility back to peak efficiency, safely and quickly
Forty years. Four decades of firsts.
Project after project, industry after industry. We’ve built a global legacy of solving the toughest material-flow challenges, with thousands of cleanouts across all 50 states and 35+ countries.
Founding & Firsts
First Colony silo cleanout. Dec 1986: R. John Lehman acquires the Mole·Master® division. First Cargill grain project. First “Cootie” drill and Junior 180 built. First international jobs in Guadeloupe and Martinique. First $100k project.
The BeginningBuilding Capacity
Move to 117 Industry Road. Multiple years of zero lost-time accidents. Bridge Breaker / Arch·Master® launched. Serve-All acquired. First vacuum trucks and hydro-blasting. Depots opened in California and Texas. Service in 20+ industries. First $200k project.
Scaling UpScale & Standardization
Move into the current 600,000 sq ft Reno, Ohio facility. Hydraulic and Pneumatic Junior 360°® developed. Corporate contracts with Cargill, Mars, Lehigh Cement and more. First project in Hawaii, all 50 states covered. First $500k project.
Becoming The StandardRecognition & Expansion
25th Anniversary celebrated in 2011. Featured in Grain Journal in 2013. Mid-Ohio Valley Safety Council 100% Safety Award for zero lost-time accidents in 2015.
Industry RecognitionNew Services
New website with full technical resource library (2017). Abrasive blasting service expanded (2018). Joined the Renewable Fuels Association (2019).
Service ExpansionThought Leadership
Featured in World Cement (2023). 40th Anniversary celebrations throughout 2026. Major presence at IPPE 2026 in Atlanta. Just getting started.
The Next 40Aligned with the bodies that hold the industry to standard.
Membership isn’t a sticker on a truck. Each of these organizations represents a continuous credentialing, auditing or training commitment Mole·Master® has chosen to make.
Mid-Ohio Valley Safety Council
Member since 2012. Recipient of the 100% Safety Award for zero lost-time incidents on the job.
ISNetworld®
Member since 2009. Verified contractor management system across the energy and industrial sectors.
Avetta®
Member since 2010. Global supply-chain risk management for safety, sustainability, and compliance.
BROWZ®
Member since 2005. Third-party contractor pre-qualification used by Fortune-500 operators.
First Verify
Member since 2012. Background screening and drug-testing programme for site access.
Renewable Fuels Association
Member since 2019, supporting the bio-fuels and ethanol industries we serve.
MSHA 5000-23
Every Mole·Master® technician is MSHA-certified for mine-site safety.
OSHA-Compliant Programmes
Confined Space Entry, Lock Out / Tag Out, Hazard Recognition, Right-To-Know.
Put four decades of experience to work on your silo.
One call, one project lead, one quote. Same crew that’s cleaned vessels for Cargill, Mars and Lehigh Cement is ready for yours.