CJ Enterprise, Inc.

Northridge, CA

We design with people in mind.

Services: 39
Offices: 1
Projects: 5
Leaders: 2
Size Estimate: 2-5 employees

Overview

CJ Enterprise, Inc. is a professional mechanical engineering practice specializing in HVAC system design, plumbing design, and energy efficiency consulting. The practice supports higher education campuses and commercial facilities, delivering practical and maintainable infrastructure solutions.

Size Estimate: 2-5 employees

Services

HVAC System Design

Engineering of heating, ventilation, and air conditioning systems that create comfortable, efficient, and code-compliant indoor environments. Services range from small rooftop unit replacements to large-scale central plant designs, focusing on robust, reliable solutions built for long-term maintainability.

Central plant design Chiller plant replacement and upgrades Rooftop unit replacements Air handling unit rehabilitation Thermal energy storage systems Heat recovery systems VRF system design Control sequences and sequences of operation Construction documents and specifications

Plumbing Design

Design of building plumbing systems to ensure reliable access to clean water and efficient removal of wastewater in compliance with local building codes. Solutions focus on selecting appropriate piping materials, optimizing layout efficiency, and integrating key components like pumps, valves, and fixtures.

Domestic water system design Sanitary waste and vent design Code-compliant plumbing layouts Construction documents and specifications

Feasibility Studies and Life Cycle Cost Analysis

Assessment of the financial and operational impacts of proposed engineering projects to ensure investments are justified. Evaluations analyze real-world factors including implementation timelines, potential operational disruptions, and broader building impacts rather than relying solely on theoretical models.

HVAC upgrade feasibility studies Life cycle cost analysis Energy and operational impact assessment Payback period analysis

Energy Efficiency Consulting

Implementation of sustainable strategies to reduce energy consumption and operational costs for buildings and central utilities. Services leverage credentials in energy management to optimize performance across systems, integrating decarbonization and sustainable design practices.

Decarbonization strategies Sustainable design practices Certified Energy Manager (CEM) services Central plant optimization

Retrofits and System Upgrades

Evaluation of existing mechanical infrastructure to identify performance improvements, energy savings, and modernization opportunities. Upgrades are engineered to integrate smoothly with existing conditions and maintain continuity of operations.

HVAC system performance assessments Deferred maintenance programs Equipment modernization System integration with existing infrastructure

Professional Peer Review

Independent technical review of engineering documents, plans, specifications, and reports to verify project alignment with objectives and codes. Evaluations draw on decades of experience to assess constructability, maintainability, and proper system integration.

Code compliance review Constructability review Maintainability assessment System integration review

Construction Support

Technical administration during the construction phase to facilitate successful delivery according to owner requirements. Services focus on rapid turnaround of submittals, product data, shop drawings, and responses to requests for information to minimize delays.

Construction administration RFI and submittal review Bid support Commissioning coordination

Industries

Education Commercial Industrial

Firm type

Mechanical Engineering Owner's Engineer

Project types

Central plant design and upgrades Chiller plant replacement Thermal energy storage Heat recovery and absorption chiller integration Air handling unit rehabilitation Life safety infrastructure upgrades Tenant improvement HVAC Plumbing and restroom renovation Feasibility and life cycle cost studies

Projects

UCSB Santa Catalina Residence Halls Fire Pump and Emergency Power

Isla Vista, CA | University of California, Santa Barbara | Education

Modernization of life safety and mechanical infrastructure serving two ten-story student housing towers in Isla Vista, California. The scope includes replacing and electrifying the existing diesel fire pump system and installing a larger Tier 4 emergency generator to support both the fire pump and the building's required life-safety electrical loads. Mechanical improvements include replacing rooftop exhaust fans, replacing rooftop make-up air units, and rebalancing ventilation systems.

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Trigeneration Plant Heat Recovery and Absorption Chiller

Fullerton, CA | California State University, Fullerton | Education

Modification of the central plant to improve overall energy efficiency and utilize waste heat from a campus gas turbine generator. The project involves installing a heat recovery heat exchanger on the turbine exhaust to generate heating hot water and drive a single-effect absorption chiller, as well as installing pumps, modifying the condenser water system, and developing new plant control strategies.

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UCSB Library Chiller and Cooling Tower Replacement

Santa Barbara, CA | University of California, Santa Barbara | Education

Replacement of an aging 1000-ton centrifugal chiller with a flexible configuration consisting of two 600-ton centrifugal chillers, a two-cell cooling tower, and new condenser water pumps. The project required developing new control sequences to integrate the library plant with the campus central chilled water system, as well as overcoming tight space constraints in a basement mechanical room.

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UCSB Engineering II Building AHU Rehabilitation Program

Santa Barbara, CA | University of California, Santa Barbara | Education

An alternative deferred maintenance approach overhauling and modernizing seven large heating and ventilation air handling units rather than replacing them. This rehabilitation program refurbishes internal assemblies and retains existing unit casings, reducing construction costs to one-third of a full replacement and minimizing building downtime.

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Coastline Equipment Warehouse Tenant Improvement

Long Beach, CA | Coastline Equipment | Commercial

Renovation of a two-story office space in an equipment warehouse. The project features the installation of a new VRF mechanical system, a gender-neutral restroom layout with four water closets, an upstairs restroom with a shower, utility sinks, and a plumbing system overhaul.

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Credentials and affiliations

Certifications

Certified Energy Manager (CEM)

Leadership

James Valiensi

Principal / Co-Founder

PE, CEM

James has worked in the operations, maintenance, installation and design of HVAC systems since 1985. Having started his career in owner-side facilities, he gained practical experience repairing and putting together HVAC systems and collaborating with design professionals. This hands-on background allows him to develop cost-effective, easily buildable, and maintainable solutions for both simple rooftop replacements and complex central plant designs.

Clara McCarthy

Principal / Co-Founder

Clara brings energy and a problem-solving focus to her engineering work. With extensive experience surveying mechanical systems in the field, she visualizes projects clearly and turns complex technical ideas into accessible concepts. She challenges conventional approaches to deliver modern, client-focused designs.

Testimonials

James, Clara - I've been meaning to thank you for the great submittal and RFI reviews and responses. They are very clear, and timely - that may sound simple, but it does not always happen on every job!
Ernest Knapp, Project Manager, University of California, Santa Barbara

Team CJE - I really appreciate the way you bake in with the project teams and let'er rip. All gas no brakes!!!
Bill Thompson, Founder, Prime SC Mechanical Contractors

Offices

Headquarters

9227 Reseda Blvd., No. 186

Northridge, CA 91324

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