Salary : $79,612.21 - $130,422.86 Annually
Location : Corbalis Water Treatment Plant
Job Type: Full Time
Job Number:Division: Technology
Department: Instrumentation North
Opening Date: 10/28/2026
Closing Date: 11/11/2026 4:30 PM Eastern
DescriptionUnder limited supervision of the Instrumentation Supervisor, Senior Instrumentation Technician participates in and assists with the planning of departmental programs. Assists the supervisor and coordinates daily operations, performs highly skilled instrumentation work required in the installation, maintenance, testing, and repair of instrumentation & control systems used in all Fairfax Water facilities.
Examples of Duties Assists with departmental programs, as directed and leads and coordinates daily activities of a group of instrumentation technicians engaged in the installation, alteration, maintenance, testing, and repair of instrumentation & control systems in the production, treatment, and distribution of water.
- Performs highly skilled installation, preventive and corrective maintenance work by:
- Making inspections of process control instrumentation and electronic equipment.
- Analyzing and investigating causes of instrument failures, irregular operation, and determines the nature and extent of repairs and work sequences required.
- Utilizing electronic test equipment to identify causes of abnormal operations and to verify correct and accurate operations of instruments.
- Installing, calibrating and repairing the more complex process control computers, filter systems, flow and pressure recorders and transmitters. Chlorine, pH and turbidity monitoring equipment. Plant and distribution telemetering equipment. Electronic/electrical control circuits and other complex instrumentation activities utilized in the water treatment process.
- Maintaining SCADA (includes Plant computer systems and Remote PLCs) and perform emergency repair.
- Conducting routine preventive maintenance tasks at storage tanks and pumping stations.
- Reviewing specifications, electronic schematics, circuit diagrams, and manufacturer manuals.
- Maintaining network infrastructure including routing, switching, encryption, wireless, network management and network security in coordination with OT Analysts and/or Systems Controls Engineers.
- Assures proper maintenance of equipment and office records by:
- Maintaining assigned Fairfax Water vehicles and tools including
shop testing equipment. - Maintaining and updating equipment maintenance and service files.
- Maintains spare parts and project material inventory by estimating
costs and preparing purchase orders to replenish stock levels. - Providing guidance and directions to junior technicians as
necessary
- Performing various administrative tasks, including but not limited to:
- Interviewing for staff vacancies, scheduling employee training
and obtaining Vendor quotes. - Maintaining inventory for the virtual warehouse in the Integrated Enterprise System
(SAP). - Utilizing SAP to schedule, plan and track costs, parts, projects, and work
orders. - Scheduling and coordinating the completion efforts of electrical assignments with
other departments. - Efficiently, using the Integrated Enterprise System (SAP) for receiving work
orders, ordering and maintaining the inventory of parts, updating notifications,
confirming work orders for completion, and recording time worked. - Acts as supervisor in the absence of the instrumentation supervisor
- Performs other duties as assigned or required.
Typical Qualifications - Associates Degree or Two year Trade School diploma/certification in Instrumentation, Electronics, or related field of study; OR Journeyman's Electrical License, or any equivalent combination of education, experience and knowledge.
- Advanced knowledge of the theory, methods and practices of electronics.
- Advanced knowledge of the tools and equipment used in electronic equipment repair.
- Advanced skills and knowledge of the functioning and maintenance of process control instrumentation.
- Considerable knowledge of safety regulations and accident prevention practices.
- Good computer hardware and software skills.
- Demonstrated skills to locate and correct defects in instrumentation and electronic devices.
- Demonstrated skills to read electronic schematics, circuit motor and electric control drawings and manufacturer manuals.
- Experience developing technical drawings.
- Experience reading and understanding Ladder Logic related to programmable logic controllers.
- Experience instructing other technicians.
- Experience leading and instructing staff.
- Required to work at other Fairfax Water locations as needed.
- Ability to establish and maintain effective working relationships with co-workers, supervisors, and the public.
- Must pass a controlled substance (drug) test for employment.
- Possession of a valid driver's license and good driving record.
- Required to work scheduled and emergency overtime as required.
- Required to be on-call 24/7/365.
- Required to work standby.
Preferred Qualifications:- Minimum of seven years progressively responsible instrumentation and electronic repair experience, or any equivalent combination of education, experience and knowledge.
- ISA CCST certification.
- AutoCAD Certified User Certification.
- Certified Automation Professional (CAP).
- Electrical Journeyman's License.
Supplemental Information - Ability to perform heavy manual work under varying weather conditions.
- Ability to climb and work from water tanks.
- Ability to distinguish colors of electrical wiring.
Fairfax Water is committed to providing comprehensive benefits to our employees and their eligible dependents, as well as opportunity for continued education and professional development. A summary of these benefits is listed below.
HolidaysJanuary - New Year's Day; Inauguration Day; Martin Luther King Jr. Day
February - George Washington Day
May - Memorial Day
June- Juneteenth
July - Independence Day
September - Labor Day
October - Columbus Day
November - Veterans' Day; Thanksgiving Day; Day After Thanksgiving
December - Christmas Eve ½ Day; Christmas Day
Health Insurance - Employee Cost/MonthEmployee Only - $100.88
Employee + 1 - $335.74
Family - $ 466.74
The Fairfax Water Health Plan is offered to all permanent full time employees and their eligible dependents. We offer self-insurred bundled medical, dental and vision plans administered by a third party administration.
Coverage is effective 1st day of month after hire if hired between the 1st and 15th of the month. If hired between the 16th and 31st of the month, coverage is effective the 1st day of the 2nd month after hire.
Group Life Insurance - Employee Cost MonthBasic = 2 times annual salary
Paid by Fairfax Water
Supplemental 1 to 6 times annual salary
Age-banded rates
Additional supplemental life insurance request requires you to submit an evidence of insurability form (EOI).
Dependent spouse and/or child - $2.55 per month cost for either spouse only, children only or both.
The Group Life Insurance Plan is offered to all permanent full time employees. Effective date follows same rule as health insurance.
Long-Term Disability Effective after 36 months of employment with Fairfax Water. Benefit is equivalent to 66.7% of base pay at no cost to the employee.
Fairfax Water Retirement Plan - Is a defined benefit plan in which all regular full time employees are enrolled in at time of hire at no cost to employees. Employees are vested after five years of service.
457 Plan - Is a deferred compensation plan which employees can voluntarily participate in with either Pre-tax or Post-tax contributions to maximum contribution as established by the IRS on a yearly basis.
Additional BenefitsFlexible Spending Accounts: Fairfax Water offers a Medical Flexible Spending Account where employees may contribute up to $3,400 per year on a pre-tax basis for eligible expenses. Fairfax Water offers a Dependent Care Flexible Spending Account where employees may contribute up to $7,500.00 per year on a pre-tax basis for eligible child-care expenses.
Child/Adult Care Reimbursement: Employees with household incomes up to $118,400 my be eligible for an annual subsidy for licensed child/adult care ranging from $1,600.00 to $4,000.00 depending on eligibility.
Paid Family & Medical LeaveUp to 240 continuous hours of paid leave in a rolling 12-month period for qualifying continuous absences that are covered under the Family and Medical Leave Act.
Professional Development: Reimbursement of approved attendance at professional conferences and seminars.
Direct Deposit of pay. Pay days are bi-weekly on Thursday.
This review is intended to be a brief summary of the major benefits provided by Fairfax Water. In all instances, plan documents and policies govern the eligibility and administration of each benefit plan. 
