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M.C. Dean
UPS Tech 1- San Francisco, CA
Career Insights for Electrical Substation / Relay Repairer
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What they do
An Electrical Substation or Relay Repairer works at an electrical substation and operates equipment that controls the flow of electricity. Maintains and repairs relays or switches in a system that allows electricity from a power station to travel through the substation out to the distribution system and to customers.
$103,453 / year median in California
+2% projected growth
Job Description
UPS Tech 1- San Francisco, CA M.C. Dean paid time off, tuition reimbursement, 401(k), retirement plan United States, California, San Francisco Jun 30, 2026
Overview About M.C. Dean
M.C. Dean is Building Intelligence. We design, build, operate, and maintain cyber-physical solutions for the nation's most mission-critical facilities, secure environments, complex infrastructure, and global enterprises. With over 9,000 employees, our capabilities span electrical, electronic security, telecommunications, life safety, automation and controls, audiovisual, and IT systems. Headquarters in Tysons, Virginia, M.C. Dean delivers resilient, secure, and innovative power and technology solutions through engineering expertise and smart systems integration.
Why Join Us?
Our people are passionate about engineering innovation that improves lives and drives impactful change. Guided by our core values-agility, expertise, and trust-we foster a collaborative and forward-thinking work environment. At M.C. Dean, we are committed to building the next generation of technical leaders in electrical, engineering, and cybersecurity industries. The Critical Power Group is responsible for maintaining, servicing, and troubleshooting UPS systems, batteries, and other critical infrastructure equipment. Our technicians are factory trained on most major UPS manufacturers of static equipment (e.g., MGE/APC, Liebert, Toshiba/Mitsubishi, and Powerware/Eaton to name a few). Our technicians perform preventive maintenance and equipment testing as well as emergency service calls at high profile government, institutional and commercial customer facilities. The Critical Power Group also provides engineering and technical support to customers and other divisions of M.C. Dean, Inc. Responsibilities Daily travel with independent work structure
Emergency call availability 24/7 unless on PTO or Off Call.
Maintain safeguard company issued equipment, tools, and instruments
Installation and repair of static switch and PDU systems
Perform required preventative maintenance service to equipment under contract as scheduled.
Customer contact and interface
Communicate availability status to corporate office
Communicate availability status to Team Lead or manager
Protect company proprietary information, manuals, and records
Use of electronic and electrical test equipment as necessary
Coordinate and manage all on-site subcontractors hired by M.C. Dean as necessary
Maintain company or personal vehicle in safe and operational condition; maintain insurance as required by company.
Ensure that work is performed to M.C. Dean standards
Complete all paperwork, including Field Service Reports, Time Sheets, and Expense Reports, and other job required reports timely and accurately
Provide technical support to customers upon request
Maintain Technical documentation for study and/or review
Willing and able to attend product specific training as company deems necessary
Cross train others as needed Other duties as required Inspect static swathsystems associated with power backup systems and their associated controls. Inspections include, but are not limited to Initial, In-process, Visual Condition, and Final Inspections, Maintenance Operational Checks, and Failure Analysis, and repairs.
Certifies by signature to the customer that systems and components adhere to quality standards established by applicable codes, publications, checklists and specifications.
Reviews and checks system drawings and specifications for accuracy and completeness. Determines maintenance requirements, inspection requirements, and compliance with technical standards. Resolves discrepancies between recorded and actual system components by research with owner/manufacturer or by physical inspection. Corrects and certifies changes entered for record.
Provides technical assistance and expertise to owners and engineers. Performs inspections, technical assistance, maintenance assistance, and instruction of site personnel and engineers. Advises site personnel on proper maintenance practices, procedures, and techniques. Reviews and interprets existing technical publications applicable to inspection, modification, and maintenance of power electronics. Resolves technical problems encountered. Prepares reports of findings and makes recommendations on system improvements and implementing quality control programs.
The physical demands are represented of those that must be met by an employee to successfully perform the essential functions of the job, including lifting and installing batteries. Company expects the employee to observe all safety standards.
Maintains operational expertise with the following instruments:
Digital Multi-meter
Micro Ohm-meter
Insulation Test Equipment
Battery Test Equipment (Alber/Midtronics)
Requires 7X24X365 availability when on call. May require overnight travel at company expense.
Performs other duties as assigned.