High School Diploma, GED, or equivalent with 12 months of relevant experience in Transmission field or high voltage electrical equipment, or an Associate's degree in electrical technology.
For Sr. level: High School Diploma, GED, or equivalent with 3+ years of related experience, or an Associate's degree in electrical technology.
1+ years of experience working directly with a Diagnostic Test Technician is preferred for Sr. level.
Basic understanding of electrical circuit theory and computer skills.
Demonstrated leadership and effective problem-solving abilities.
Responsibilities
Perform diagnostic tests on substation equipment to assess integrity.
Conduct battery and charger diagnostics, troubleshooting, and repairs.
Record and analyze test results to determine equipment status.
Develop wiring diagrams from equipment schematics for testing activities.
Calibrate and troubleshoot test equipment as needed.
Execute switching operations to ensure safe testing without service interruption.
Evaluate new test equipment and systems for compliance with company standards.
Benefits
Annual incentive program.
Comprehensive health and welfare benefits (medical, dental, vision, life insurance).
Wellness incentives (up to $2,000 in 2026) and wellbeing resources.
401k with dollar-for-dollar company match up to 6%.
Cash balance pension plan.
Adoption Assistance and mental health resources.
Tuition reimbursement and competitive vacation time.
Paid parental leave and salary continuation for illness or injury.
Full Job Description
Salary Range: $86,328 - $131,300 Close Date: 11/10/2026 at 3:00 pm CT Relocation: Yes
Position Summary
As a Diagnostic Tech Technician (DTT) at Oncor, you'll perform various diagnostic tests on system equipment, analyzes test data, documents results, and recommends future action to ensure continued safe and reliable service of equipment.
Key Responsibilities:
Performs tests on insulating medium of substation equipment to determine its integrity. These tests include power factor, dielectric breakdown, moisture content, total combustible gas, and dissolved gasses.
Performs station battery and battery charger diagnostic tests, trouble-shooting, and facilitates repairs/replacements to ensure the reliability of Direct Current power to the substation equipment.
Records and analyzes test results (trend analysis) to determine equipment status as to its suitability to return to service, or specifies needed repairs.
Develops wiring diagrams reflecting test circuits from equipment schematics to be used for subsequent installation and testing activities.
Performs checkout, calibration, troubleshooting, and repairs of test equipment as needed.
Performs switching operations and initiates actions to restore service at transmission and distribution substations to ensure testing is done safely and without interruption of electrical service to customers.
Participates in evaluating and determining the acceptability of new test equipment and computer systems / programs to ensure the devices will meet or exceed company standards and test requirements.
Prepares and processes documentation as required, to ensure test results are clearly understood and appropriate actions taken.
Performs all work consistent with established safety procedures.
Additional responsibilities for Sr. level:
Directs and coordinates the work of others assisting in diagnostic testing.
Responsible for preparation of the power equipment to be tested (ground, disconnect, reconnect, unground) and making necessary minor repairs, if needed.
Performs training when called upon regarding diagnostic testing, both classroom and field.
Maintains records including computer databases for test results to ensure historical information are readily accessible for trend analysis in determining equipment condition.
Analyzes test data to determine the need and schedule for additional testing of suspect equipment.
Utilizes computer-based maintenance scheduler to ensure electrical equipment is tested in accordance with appropriate maintenance intervals and test results are properly retained for future reference.
Performs all essential aspects and functions of the job as well as any other specific job requirements.
Willing to travel to attend training and assist in other areas of the company.
Willing and able to respond to routine and emergency call outs.
Skills:
Basic understanding and working knowledge of electrical circuit theory and computer skills.
Demonstrated leadership abilities.
Effective problem-solving abilities.
Effective communication skills.
Education & Experience:
DTT
High School Diploma, GED, or equivalent with 12 months of Transmission field or prior related industry experience working with high voltage electrical equipment is required OR
An Associate's degree in an electrical technology field can be accepted in lieu of the above.
DTT Sr:
High School Diploma, GED, or equivalent with 3+ years of related experience working with high voltage electrical equipment is required OR
An Associate's degree in an electrical technology field can be accepted in lieu of the above.
Applicants with 1+ years of experience working directly with a Diagnostic Test Technician are encouraged to apply.
Measure of Success:
Completion of DTT Required Objectives (DRO) training requirements.
Maintain current diagnostic requirements and staying current with any new DTT related technology.
Timely and accurately completing workload.
Benefits
At Oncor, we offer a comprehensive set of benefits, compensation and performance management programs designed specifically to attract, retain, motivate and reward our high-performing workforce. Our supportive and inclusive culture allows every team member the opportunity to thrive and make a difference. We invest in our employee's success and well-being by offering such things as:
Annual incentive program.
Competitive health and welfare benefits (medical, dental, vision, life insurance).
Ability to earn wellness incentives (up to $2,000 in 2026) and other wellbeing resources.
401k with dollar-for-dollar company match up to 6%.
401k match with student debt program.
Cash balance pension plan.
Adoption Assistance.
Mental health resources.
Employee resource groups.
Tuition reimbursement.
Competitive vacation, 10 company holidays and 2 personal holidays.
Paid parental leave.
Salary continuation for up to 6 months for approved employee illness or injury.
Other perks such as commuter benefits, electric vehicle incentive program, appliance purchase plan.
Participation in benefit programs for employees in collective bargaining units is subject to the applicable collective bargaining agreement.
