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About Us

Established in 2005, Challman Engineering, Inc., has produced hundreds of quality projects in the Antelope Valley community and the surrounding areas. Our company started in a small office in Littlerock, California, and has grown into the premier engineering firm in the valley.

Using innovative technology, we apply our knowledge and experience as we engage with our clients to assess their goals and meet their needs at a cost they can afford. 

Our new Palmdale offices are equipped with state of the art software that develops a 3D model that enables the client to visualize a project before construction begins. Desired changes can be made in real time, allowing clients to make informed decisions regarding modifications. 


We are the parent company of CEI Build, Inc., a design-build company that moves a project from conception to completion. 

Challman Engineering, Inc., and CEI Build, Inc. are ready to help you with your next project, and we look forward to planning it with you. 

Meet our Staff:
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Erick Altman, Designer and Challman Engineering's resident Revit-BIM specialist, has been part of our team since 2018. Prior to joining our team, he received his education at Santa Monica College and Los Angeles Trade Technical College for Architecture Design and Drafting. Additionally, he has studied sustainable design and is LEED certified. Erick enjoys designing and using 3D modeling to show clients how their project will look when it is built. His goal is to help clients bring their dreams into reality. 

Bill Challman, PE, Owner/President, began his engineering career working for his father, a civil engineer, in 1988. As a registered civil engineer in California, Bill enjoys sitting down with clients and personally helping them create a design that meets their needs while also meeting their budgets. Bill's broad experience with architectural design, structural engineering, civil design, and land development enables him to visualize these components coming together and interacting on any given project. 

Elizabeth Destro, Project Manager, handles the permitting process and assures that projects are moving forward as expected, walking our clients through the entire process. She has been with the company since 2020 and ensures customer satisfaction by contributing her passion for bringing our clients' project plans and dreams to life. Prior to joining the Challman Engineering team, she logged 5 years experience in different positions and became a self-driven achiever of goals. In 2015, Elizabeth graduated from Federal University of Santa Catarina, Brazil, in Architecture. In her spare time, she enjoys visiting new places with her husband and son. She knows that great accomplishments come from focused teamwork.

Ella Harper, Administrative Assistant, has been part of the Challman Engineering team since 2020. She takes pride in satisfying the needs of our clients as she schedules their appointments, provides answers to their questions and concerns, and maintains an organized business environment. Ella enjoys meeting the daily challenges that working in a busy office provides. In her spare time, she spends her time with her three children and keeps herself available to serve others. Her faith in "I can do all things through Christ" helps her meet the daily challenges, and her three children inspire her to do her best.

Karla Martinez, Designer, joined the Challman Engineering team in 2022. She has worked in the design and construction fields since 2017 and graduated from the Institute Technological of Mexico in Architecture in 2021. Along with her work experience, Karla brought her enthusiasm for designing the client's dream into reality. She contributes her love of learning and taking on new adventures as she continues to expand her knowledge of construction systems.


Mohammad Moeini, Civil/Structural Engineer, has been part of the Challman Engineering team since 2018. He earned his bachelor's degree in civil engineering from Azad University in Iran and his master's degree in structural engineering from California State University, Northridge. Motivated by the desires of the clients and the requirements of effective design, Mohammad uses his creativity to analyze and develop structural plans that meet specifications for both strength and flexibility and are able to withstand the pressures associated with dynamic, static, wind, and seismic loads. When he is not designing structures, he enjoys spending his time with his wife and daughter and his interests in travel, soccer, and Persian food.

Ken Verzosa, Project Manager, has been working in the engineering field since 1986, with specific experience in land development, civil engineering, and architectural design. He has been with Challman Engineering since 2015. He has experience as a project manager and has worked on a variety of residential and commercial projects.


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