Assistant Oil Rig Roughneck Jobs in Littleton, CO

Field Service Technician II

North American Substation Services (NASS) is a national leader in transformer services and highvoltage substation installation, maintenance, testing, and repair. With more than 20 years of experience, we deliver comprehensive, onestop solutions for utilities, industrial operations, and critical infrastructure across the United States. Our teams support the full lifecycle of substation and transformer assets, including installation, maintenance, major repairs, and diagnostic testing. 

Core services include transformer assembly, oil processing, regasket and lifeextension work, substation apparatus testing, and highvoltage equipment maintenance to ensure safe, reliable system performance. We work on a wide range of substation equipment-power transformers, breakers, switches, arresters, and control cabinets-and perform essential diagnostics such as TTR, winding resistance, insulation resistance, powerfactor testing, and oil analysis through our dedicated inhouse laboratory. With a nationwide fleet of mobile oilprocessing units, we provide rapid onsite support backed by strong technical expertise, a commitment to safety, and disciplined field execution to keep critical power systems operating reliably and efficiently. 

Benefits 

• Medical, dental, and vision coverage 
• 401(k) savings plan with company match 
• Health Savings Account (HSA) and/or Flexible Spending Account (FSA) 
• Life and AD&D insurance 
• Short-term and long-term disability coverage 
• Employee Assistance Program (EAP) 

Perks 

• Competitive pay 
• Talent development through instructor-led and online learning 
• Career path planning 
• Incentives for professional certifications 
• Per diem for travel 
• Referral bonuses 
• Tuition reimbursement 

Pay:

The hourly rate for this position is between $27.00 - $35.00 per hour.Factors which may affect starting pay within this range may include geography/market, skills, education, experience, and other qualifications of the successful candidate.

Position Overview 

The Field Service Technician II performs intermediate-level installation, maintenance, inspection, and repair of power transformers and high voltage substation equipment. This role supports field operations by performing hands-on tasks including transformer assembly, oil processing support, gasket and bushing work, component inspections, and basic electrical and mechanical testing under limited supervision. 

• Follow company safety policies, procedures, and PPE requirements; participate in all safety meetings and training. 
• Perform intermediate level field work including LOTO, grounding, arc-flash protocols, and site preparation. 
• Assist with transformer electrical testing by supporting diagnostics, data collection, and proper test setup. 
• Operate dry air equipment and support moisture control processes during transformer assembly. 
• Measure, cut, and install gaskets and sealing components. 
• Assist with transformer internal work such as inspections, fastener adjustments, and component support. 
• Support vacuum setup and operation during transformer processing activities. 
• Oversee rig operations during overnight or extended shifts, ensuring safe and compliant performance. 
• Assist with installation and commissioning of monitoring devices such as Calisto or other condition-monitoring systems.

Required: 

• Two or more years of experience in transformer services, substation work, or electrical/mechanical field maintenance 
• High school diploma or GED 
• Valid driver's license and insurable driving record 
• Ability to stand, walk, climb, crawl, bend, and lift/carry up to 50 lbs. 
• Ability to work safely in outdoor, high voltage, and industrial environments 
• Willing and able to travel frequently (up to ~80%), including overnight stays and variable schedules 
• Willingness to complete job-related background checks and medical evaluations 
• Ability to communicate clearly and follow written and verbal instructions 

Preferred: 

• CDL or interest in obtaining one 
• NCCCO crane certification or rigging/lifting experience 
• Working knowledge of mechanical fundamentals and industrial tools 
• Familiarity with substation hazards, LOTO procedures, grounding, and arc-flash boundaries 
• Ability to read or willingness to learn to read electrical diagrams, one-lines, and field metering devices 
• Interest in learning transformer testing, oil-processing support, and advanced procedures 

Work Environment & Physical Requirements: 

• Outdoor field work with exposure to weather, energized equipment, and industrial conditions 
• Vehicle and air travel, extended stays, and occasional international travel 
• Reasonable accommodations may be made for qualified individuals 

EEO Statement 

NASS, an Asplundh Power Company, is an Equal Opportunity Employer. All qualified applicants will receive consideration without regard to race, color, religion, sex (including pregnancy, gender identity, and sexual orientation), national origin, age, disability, veteran status, or any other protected characteristic. NASS does not engage with individual recruiters or third party staffing agencies. Unsolicited resumes will not be accepted. 

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