(661) 750-0294


Who We Are

Lonestar Sierra specializes in the latest refractory installations and mechanical procedures, with an emphasis on safety and personalized service.

We perform scheduled and emergency turnarounds, ongoing maintenance services and shop work across the continental United States.

Refractory Services

Mechanical Services

Our Mission

Our success is built upon earned trust. We continually provide services that others cannot. Our clients and partners understand that our services and expertise are based upon a desire to forge and maintain partnerships that last for years.

We understand that not only is it a priority to provide excellent craftsmanship, but also to provide completed projects within stated budgets and schedules. This is why we are continually called upon to provide services in time-sensitive and demanding situations.

Our management team is dedicated to creating a mistake-free work environment on both shop and field projects. As a condition of employment, we expect each employee to share our QA / QC mission and accept his or her responsibility to contribute to the achievement of our goal.

We are not affiliated with any material manufacturer or contracted to install any particular product line. This allows us to become familiar with the latest materials and installation methods, without restrictions or licensing infringements.

Industry Focus

With locations in Central California and Southern Colorado, we are strategically located to provide emergency callout services throughout the Western United States. We also have the capabilities and resources to provide scheduled turnaround services anywhere in the United States.

  • Cement and Lime

    Emergency and Turnaround Refractory and Mechanical Services Including Preheater Process, Kilns, Mills, and Coolers

  • Steel and Metals

    Emergency and Turnaround Services for Metal Manufacturing including Walking Beam, Reheat, and Rotary Furnaces

  • Power Generation

    Emergency and Turnaround Services for CFB's Including Refractory Linings, Vortex Finder Repairs, and Burner Tiles


Prequalifications for Safety Programs and Insurance Coverage

Browz LLC

Our Browz membership communicates our commitment to safety and a transparent risk management system

Avetta (formerly PICS)

As a confirmed and audited member of Avetta, we are confident in an up-to-date health and safety program