General Engineering & Contracting
Whether you're building your dream home, improving your property, or have commercial needs, we prep your site for success — safely, efficiently, and on schedule.
From large-scale excavation and utility extensions to grading, roads, and concrete work, we take care of the groundwork, so you can focus on the big picture.
Contact
Jeff Olesh - Direct (707) 297-5468
Jimmy - Office Olesh (661) 916-1726
Services
Earthwork
Full-service site preparation, including clearing, grading, and shaping the land to create a stable foundation for your project.
Mass Excavation
Large-scale excavation for commercial, residential, or infrastructure projects — safely and efficiently moving large volumes of earth to prepare your site.
Fine Grade
Precision grading to achieve exact elevations and smooth surfaces, ensuring proper drainage and a flawless foundation for building or paving.
Private Roadways
Design and construction of durable private access roads, driveways, and pathways built to meet your property’s specific needs.
Single Residence Development
Complete site development for custom homes, from initial grading and utility prep to final grading ready for construction.
Blockwork
Expert installation of block structures for walls, fences, planters, and more — providing strength, stability, and clean design.
Concrete Flat Work
Smooth, durable concrete surfaces for patios, driveways, sidewalks, and slabs — poured with precision and built to last.
Retaining Walls
Structural retaining walls designed to hold back soil, prevent erosion, and create level spaces, while enhancing the look and functionality of your property.
Residential Homesites
Complete preparation of residential lots, including grading, drainage, utilities, and pad certification — ready for home construction.
So Cal Electric Extension
Coordination and installation of Southern California electric service extensions to connect your property to the grid safely and up to code.
Land Clearing
Fast, clean removal of brush, trees, and debris to get your site ready for grading, building, or landscaping.
Our Projects
Family Owned & Operated
SKJ Engineering Corporation has proudly served Southern California since 2007, bringing over 30 years of hands-on experience in earthwork, mass excavation, fine grading, and residential development.
From single homesites to larger-scale private roadways and utility extensions, we specialize in preparing land for construction with precision, efficiency, and care. Our team is known for its attention to detail, problem-solving approach, and ability to see each project through from start to finish. Whether you're building a custom home, developing a private property, or expanding a ranch or business, we work closely with clients to deliver high-quality results — on time, on budget, and built to last.
Jim Olesh, Founder & Project Lead
We don't just move dirt,
we lay the groundwork for your vision.
Client Testimonials
SKJ Engineering was extremely knowledgeable, punctual, start to finish. The excavation and compaction satisfied Los Angeles county Public Works grading guidelines and specifications. The fine-grade tolerance were in 2 hundreds a foot and resulted in a concrete savings of $2200. SKJ Engineering's expertise and experience in workmanship ship is a must on any construction project. I definitely will use SKJ Engineering again. DO IT RIGHT, DO IT ONCE!
- Bill Haffamier
SKJ was a great team to work with when it came to miles of new road design, cutting, and grading on our ranch. They were on time, efficient, and affordable.
-Cody Eastman, Eastman Livestock LLC
I am a very satisfied customer of Jimmy’s. Jimmy did a dirt work job for me which turned out great. He did everything thing he said he would do and a bit more all in less time than originally quoted. I’m a retired construction worker who knows what it takes to do a quality job. If you are considering hiring Jimmy just know that he is a very honest and hard worker that showed up every day for my job until it was finished. I absolutely would use him again if the occasion arrives
- Curtis Moran
