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Pro Structural Inc is a family-owned masonry and concrete contracting company headquartered in Lake Elsinore, California. Founded in 2015 by brothers in law Rob Yowell and Trevor Frazier, PSI quickly made a name for itself in the Southern California market by working with a select group of general contractors and providing them with unmatched customer service. PSI’s willingness and ability to truly partner with customers has allowed the business to achieve sustained growth year after year

and  become   the  premier   masonry  contractor  of

Southern California.

Specializing in commercial masonry and concrete, Pro Structural performs work on a wide variety of projects to include Federal and State government projects, large retail developments and shopping centers, single and multi-level storage facilities, grocery stores, podium projects, parking structures, retaining walls, fence walls, site wall foundations, and more.

Pro Structural is a Service-Disabled Veteran-Owned Small Business.

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With vast design build experience and willingness to assist in the early planning stages, Pro Structural provides unparalleled value to the ultimate success of every project the company is a part of. PSI holds an impressive safety record, as proven by their Workers Compensation Experience Modification Rating. At PSI, safety is not just an idea, it is a way of life.


Pro Structural Inc is comprised of a diverse group of mentally and physically strong individuals. The owners and corporate officers of the company have over 50 years of combined experience in the masonry and concrete construction industry. PSI is further supported by the knowledge of their experienced superintendents and foremen, the majority of them having over 20 years of experience in their craft. Intelligent members of the PSI team keep the administrative side of the operation running smoothly in order to support customers and employees.



Rob has over 20 years of experience as a construction manager. He has overseen the operations of hundreds of complex construction projects, along the way earning a solid reputation for the quality, safety, budget adherence, legal/regulatory compliance and on-time completion of his projects. Rob is an articulate public speaker, experienced mediator and is always seeking ways to innovate PSI’s business practices to bring more value to customers.

Before starting his construction career in 2004, he served 5 years as an Infantry Sergeant in the United States Marine Corps.


Vice President/Owner

With over 15 years of high volume, large scale commercial masonry and concrete experience, Trevor began his career at a very young age, learning the craft from the ground up. In the summer of 2000, he began working for his father's masonry business. Whether it be fabricating rebar after school, laying block on the job site, detailing projects in AutoCad,  or managing crews of up to 40 men across multiple sites concurrently, Trevor met all challenges head on and excelled. With his vast experience and passion for innovation, Trevor delivers on his knowledge when managing our field operations to get the project completed in the most efficient and safest way possible.



Holly has more than 15 years of experience managing the construction accounting and payroll operations for various construction companies. She began the journey into her career at entry-level, working after school hours filing and completing various office tasks. Today, Holly develops and implements new and effective administrative policies and procedures, putting her analytical skills to work. Her diligent implementation of new processes has been key to Holly’s success in maintaining full compliance with local, state, and federal agencies. Her expert administration skills and ability to multitask have proven to be integral in the quick turnaround of multi-million dollar project payments. 

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Pro Structural Inc understands the value of a strong company culture and values. It is important that every employee feel proud about their achievements at the end of each day. A commitment to share best practices and develop talent in order to strengthen the core of their team is what keeps the company moving forward.

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We are one team comprised of a diverse group of mentally and physically strong individuals, unified by a common goal.


We are always in search of a better way. We are honest about our failures and take immediate action to learn from them. We are committed to sharing best practices and developing talent in order to strengthen the core of our team.


We have a personal and professional commitment to protect the health and safety of our employees, customers, and communities in which we work. Safety is at the forefront of every decision we make.


Quality is central in our day-to-day activities, both in the field and the office. Our reputation for providing high quality products and services is what separates us from the competition.


We are committed to doing the right thing. We stand behind our word and always follow through on commitments. Because of our character, we foster strong and lasting relationships with our customers. 

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29190 Riverside Drive

Lake Elsinore, CA 92530

Tel: 951-303-3835

Fax: 951-565-4643



Please send bid invitations/requests for proposal to our Estimating Department email:


If you would like to discuss your project over the phone, call the office at 951-303-3835 and you will be connected to an estimator. 




For inquiries about employment or anything else, please call the office at 951-303-3835 or submit the form below so we can connect you with the appropriate person to assist you.


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