Senior Technician (Levels 3 and 4)

S3 AeroDefense, LLC; Milwaukee (WI); On-site; USD 65,000 - 90,000; Full time

Job summary

S3 AeroDefense, LLC in Milwaukee, WI seeks a Senior Technician to perform advanced maintenance and alterations on aircraft parts, leading troubleshooting efforts and mentoring junior technicians while ensuring compliance with approved data and Repair Station procedures.

You will interpret manuals, determine repair sequences, document work in the ERP system, and drive quality improvements. A technical degree or FAA license and strong measurement skills are preferred.

Qualifications

• Advanced experience in aviation maintenance or component repair, military or civilian.
• Associate degree in a technical field or FAA Airframe or Airframe & Powerplant license desired.
• Ability to use basic measurement and inspection equipment (calipers, multimeters, gauges, micrometers).
• Ability to exercise independent technical judgment on complex repairs while maintaining regulatory compliance.
• Ability to troubleshoot and guide others.
• Ability to follow approved technical data, work instructions, and shop processes.

Responsibilities

• Perform maintenance or alteration on aircraft parts in accordance with Component Maintenance Manuals, Technical Orders, or the equivalent
• Execute complex, non-routine, or high-risk repairs requiring strong technical judgment, ensuring work remains within the bounds of approved data and Repair Station authorization
• Independently interpret manuals, determine proper repair sequencing, and validate applicability/effectivity of technical data prior to execution
• Lead or significantly support troubleshooting efforts: isolate faults, verify corrective actions, and prevent recurrence of repeat discrepancies and quality escapes
• Identify opportunities to improve efficiency, quality, and repeatability and communicate them to Leads and Management
• Assist with training, OJT, and development of junior technicians; provide coaching on process discipline, documentation accuracy, and troubleshooting approach
• Support first-article work, new capability development, and stabilization of repeat repairs through improved methods, sequencing, and standard work
• Assure that prior to use, tooling or test equipment requiring calibration is not out of date and is in serviceable condition
• Make entries in the ERP system to track work accomplished
• Place orders in the ERP system for the parts needed to repair or overhaul articles
• Assure consumables are not beyond shelf life if applicable
• Maintain a clean, safe, and organized work area

Skills

Aviation maintenance

Component repair

Troubleshooting

Regulatory compliance

Technical judgment

Education

Associate degree in a technical field

FAA Airframe license (preferred)

Tools

Calipers

Multimeters

Gauges

Micrometers

Job description

Description

Purpose of the Job:

The Senior Technician performs advanced maintenance and alteration tasks and serves as a key technical resource within the Repair Station. This role is responsible for executing complex and non-routine work, leading troubleshooting efforts, mentoring technicians, and driving measurable improvements in quality, efficiency, and repeatability while ensuring strict compliance to approved technical data and Repair Station procedures.

Reports to: Lead Technician

Duties and Responsibilities:

• Perform maintenance or alteration on aircraft parts in accordance with Component Maintenance Manuals, Technical Orders, or the equivalent
• Execute complex, non-routine, or high-risk repairs requiring strong technical judgment, ensuring work remains within the bounds of approved data and Repair Station authorization
• Independently interpret manuals, determine proper repair sequencing, and validate applicability/effectivity of technical data prior to execution
• Lead or significantly support troubleshooting efforts: isolate faults, verify corrective actions, and prevent recurrence of repeat discrepancies and quality escapes
• Identify opportunities to improve efficiency, quality, and repeatability and communicate them to Leads and Management
• Assist with training, OJT, and development of junior technicians; provide coaching on process discipline, documentation accuracy, and troubleshooting approach
• Support first-article work, new capability development, and stabilization of repeat repairs through improved methods, sequencing, and standard work
• Assure that prior to use, tooling or test equipment requiring calibration is not out of date and is in serviceable condition
• Make entries in the ERP system to track work accomplished
• Place orders in the ERP system for the parts needed to repair or overhaul articles
• Assure consumables are not beyond shelf life if applicable
• Maintain a clean, safe, and organized work area

Requirements

• Advanced experience in aviation maintenance or component repair, military or civilian
• Associate degree in a technical field or FAA Airframe or Airframe & Powerplant license desired
• Ability to use various basic measurement and inspection equipment such as calipers, multimeters, gauges, and micrometers
• Demonstrated ability to exercise independent technical judgment on complex repairs while maintaining regulatory compliance and strict adherence to approved technical data
• Demonstrated ability to troubleshoot, resolve complex issues, and guide others
• Ability to consistently follow approved technical data, work instructions, and shop processes

Training:

• Initial Training as outlined in the Training Manual
• Annual/Recurrent Training as posted on the Training Log, S3RS-FM-100
• Aerospace Industry Quality Training, FAA 145, Traceability, 8130-3 documents, ESD, Suspected Unapproved Parts, Shelf Life/LLP’s, AD’s, ATA Spec 300, PMA Parts, Direct Ship Authority, Repair Stations, and Standard Terminology
• Other Trainings as assigned
• 90 Day Probation OJT