J M Sierra Company is a full-service construction firm, offering a variety of services, including engineering, pre-construction consultation, budget analysis, value engineering, and construction management for commercial, industrial, institutional and residential clients. We have taken great care to assemble a team of experienced personnel and subcontractors who are among the best in their fields. Each has demonstrated professional abilities that enable us to complete projects both on time and with minimal surprises and disruptions.

Jose L. Sierra, P.E.


The President and founder of C M Joseph Company, Jose, is a Civil Engineer licensed as a Professional Engineer and General Contractor. With thirty years of experience in the design and construction fields his expertise is clearly demonstrated in the long list of projects he has completed for the Archdiocese of Los Angeles, Providence Health System, Stor It All Self Storage and several other institutions and corporations in Southern California. Jose is active in the community and has served on several boards including Kiwanis Club of Glendale, Dominican Sisters of Mission San Jose Foundation, Loyola Marymount University, YMCA of Glendale, Glendale Community Foundation and the Glendale Association for the Retarded.

Monica P. Sierra

Vice President/CFO

The Vice-president and Chief Financial Officer of C M Joseph, Monica, has a Bachelor of Arts Degree from Chestnut Hill College and a Masters Degree from California State University Northridge. She is in charge of supervision, planning, and organization of cost accounting and contract documents. Monica is also active in the community and has served on several boards including Kiwanis Club of Glendale, Oakmont League of Women, Las Candelas, Loyola Marymount University, Vision of Hope, and Sacred Heart Elementary School Development.