ABOUT US

At CAS, we are pioneers in commercial and multi-unit residential construction, specializing in transformative large-scale renovations for apartment communities and custom homes. We don’t just build—we bring visionary concepts to life, creating expertly crafted, one-of-a-kind spaces tailored to the unique needs and dreams of each client.

With over 25 years of industry expertise, our team has completed more than 1,800 projects and renovated over 4.2 million square feet across Southern California. Every project we undertake is an opportunity to make a lasting impact, and we’re proud to give back by donating a percentage of every project to charity, reinforcing our deep commitment to the communities we serve.

Our team is a dynamic collective of industry experts, each bringing unique skills and a shared passion for excellence. We pride ourselves on collaborating closely with our clients, ensuring their vision is at the heart of every project and delivering results that not only meet but exceed expectations.

Jesse Lavie

Founder and CEO

Jesse Lavie, Founder and CEO of CAS Building Specialists Inc., is a visionary leader with over 25 years of experience in the construction industry. His career began as a concrete and asphalt specialist, where he honed his skills before striving for bigger challenges. Driven by a desire for greater impact, Jesse obtained his B License and transitioned into a licensed general contractor and building specialist.

A proud veteran, Jesse’s military background fuels his strategic, solution-driven approach, empowering his team to overcome obstacles and driving the company’s ongoing growth. His goal is nothing short of changing the face of construction by pushing the boundaries of quality, innovation, and efficiency. Under his leadership, CAS has earned a reputation as a trusted name in the industry, known for consistently delivering exceptional results on every project.

Liron Lavie

Chief Financial Officer

Liron Lavie, our Chief Financial Officer, brings over 25 years of invaluable experience in construction management, playing a central role in guiding the financial success of CAS Building Specialists Inc. As a key leader within the company, Liron oversees all financial operations, expertly managing risks and ensuring precision in bookkeeping, which allows for seamless and efficient day-to-day operations.

With her extensive expertise in budgeting, compliance, and financial reporting, Liron is instrumental in maintaining the company’s financial health and driving long-term growth. Her innovative approach to financial management and unwavering attention to detail ensure that CAS remains on a path of continued success and expansion.

Angie Proshak

Director of Client Relations

With over 10 years of experience in the construction industry and a degree in Business Development, Angie Proshak is the Director of Client Relations at CAS Building Specialists, supporting projects across Los Angeles County through Ventura County and San Diego. Angie works closely with owners, property management teams, and construction management companies to align goals, budgets, and schedules from the start, helping create a seamless path from planning through construction.

Fluent in English and Russian, Angie is known for her professionalism, responsiveness, and relationship-driven approach, ensuring clients feel supported, informed, and confident throughout every phase of a project. She connects clients with the right CAS resources, including our in-house architecture and construction teams, to support successful project delivery.

Diana

Project Manager

Diana brings over five years of administrative experience, providing vital support to both on-site and in-house teams. She manages administrative tasks, coordinates daily operations throughout each project phase, and ensures seamless communication in both English and Spanish for trade contractors and field managers.

Her excellent interpersonal skills help build strong relationships with subcontractors, clients, and team members, contributing to smooth collaboration across all project phases. As our Project Manager, Diana plays a key role in ensuring the successful and timely completion of every project.

Matthew

Project Estimator

Matthew is a highly skilled takeoff project estimator with over five years of experience in both commercial and residential estimating. With a background in architecture and construction, he studied architecture in Chicago before relocating to California to further his career in the industry. This unique blend of architectural knowledge and hands-on construction experience allows Matthew to provide precise, comprehensive estimates that ensure the success of every project.

His ability to seamlessly bridge the gap between design and construction allows him to deliver accurate estimates that align with both the vision and the practical needs of the project, all while fostering strong relationships with clients and team members alike.

Ami

Senior General Manager

With over 30 years of experience in multi-unit, commercial, and luxury home construction and renovation, Ami is a seasoned General Manager who leads with precision, innovation, and an exceptional eye for quality. Known for his sharp attention to detail and outstanding problem-solving skills, Ami ensures the successful delivery of high-quality projects from start to finish, consistently exceeding client expectations.

Fluent in English, Spanish, and Hebrew, Ami’s ability to communicate seamlessly with diverse teams, clients, and stakeholders is a key driver of success. His strong leadership and effective communication foster collaboration, enabling projects to stay on track and run smoothly, no matter the complexity.

Mateen Zar

Field Operations Manager

Born and raised in Los Angeles and a USC graduate with a background in Real Estate Development, Mateen Zar is a Field Operations Manager at CAS Building Specialists, supporting projects across Los Angeles County through Ventura County and San Diego. Mateen leads day-to-day field coordination with a strong commitment to safety, quality, and schedule performance, helping teams execute efficiently on complex commercial work.

Fluent in English and Farsi, he is known for his calm leadership, strong work ethic, and hands-on problem solving, bringing clarity, accountability, and steady execution to every jobsite from start to finish.

Bobby Chalfa, Jr., CM

Regional Construction Manager-Orange County & San Diego

Bobby brings over 40 years of experience in the construction and real estate industries, with a strong focus on residential development including single-family, multi-family, and custom homes, along with select commercial projects. His background spans estimating, purchasing, scheduling, budgeting, and project management, giving him a well-rounded perspective from preconstruction through project delivery.

He holds an active California General Building Contractor “B” license and a California Real Estate license. Fully fluent in English and Spanish, Bobby is a valuable asset when working across Southern California’s diverse communities. His industry knowledge, leadership, and people-first approach make him an integral part of the CAS Building Specialists team.