# Diesel Technician III at Knight’s Companies Inc.

Diesel Technician III at Knight’s Companies Inc. in Columbia. On-site. Posted October 16, 2026.

- Company: Knight’s Companies Inc.
- Location: Columbia
- Workplace: On-site
- Posted: 2026-10-16
- Apply: https://job-boards.greenhouse.io/knightscompaniesinc/jobs/4453589009
- Source: https://jobmagic.ai/jobs/diesel-technician-iii-knights-companies-inc-bk0nzk

## Description

Since 1969, Knight’s Companies has grown from a single septic tank pumping truck into a trusted, family-owned leader in construction and manufacturing services. Built on quality, integrity, and customer service, Knight’s Companies is committed to excellence across its Redi-Mix, Precast, Trucking, and Pumping operations. 

 

We are seeking a dedicated and skilled **Diesel Technician Level III** to join our maintenance team. In this role, you will be responsible for ensuring the safe, reliable, and efficient operation of a diverse fleet of vehicles and heavy equipment. You will also provide guidance and support to Diesel Technicians I and II, contributing to a collaborative and safety-focused work environment. If you have a strong background in vehicle repair and maintenance, and a commitment to quality workmanship, we encourage you to apply.

 

**What You'll Do:**

- Change and repair tires in accordance with manufacturer specifications.

- Perform oil and filter services on a variety of vehicles including automobiles, concrete trucks, tractor-trailers, front-end loaders, and other equipment.

- Conduct diagnostics and repairs on electrical systems, ranging from auxiliary components such as lighting and switches to complex 12V and 24V electrical architectures on fleet trucks and heavy machinery.

- Assess and maintain power and hydraulic systems to ensure proper operation and safety standards.

- Assist and provide guidance to Diesel Technicians I and II, supporting team efforts and knowledge sharing.

- Maintain accurate records of maintenance and repairs performed.

- Adhere to safety protocols and ensure all work is completed in compliance with industry standards and regulations.

- Perform service calls to diagnose and repair off-site trucks and equipment using company service vehicle. 

- Provide on-site repair services by traveling to plant facilities and vehicle locations.

- Diagnose and repair universal, slip joints, support bearings on drive shafts, air and hydraulic brake systems and pressurized water systems. 

- Work closely with Area Fleet Manager to maintain positive workflow throughout the shop. 

**What You Need to Succeed:**

 

- Valid Driver’s License required.

- High School Diploma/GED preferred.

- Auto or diesel technology diploma from an accredited technical school preferred; or minimum of 5 years’ experience performing maintenance or mechanical ability.

- ASE Certifications preferred.

- Commercial Driver’s License Class A or B preferred.

- Ability to operate a manual transmission vehicle to determine if it is operating properly.

- Must provide own hand tools & toolbox.

- Knowledge of handheld scanning tools and the process of diagnosing vehicles.

- Ability to read schematics and familiarity with the process.

- Proficient computer skills: knowledge of Excel, Word, Fleet Management Systems, and Email

- Strong written and verbal communication skills (documentation, communication with peers, supervisors, etc.)

 

**Physical Demands:**

- Ability to lift a minimum of 50 lbs. from floor to waist height.

- Ability to carry minimum of 50 lbs. over a 5-foot span.

- Ability to push / pull a minimum of 50 lbs. across a 10-foot span.

- Ability to lift a minimum of 20 lbs. from waist to shoulder.

- Use their hands to handle, control, or feel objects, tools, or controls.

- Ability to stand for extended periods of time.

- Ability to bend or twist body without restriction.

- Ability to kneel, stoop, crouch, or crawl.

- Ability to work in extreme weather, including but not limited to high heat, low temperature, and high sun environments.

 

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### **What We Offer:**

- Competitive pay

- Medical, Dental, and Vision Insurance

- Paid Time Off (PTO) and Paid Holidays

- 401(k) with Company Match

- Short-Term Disability (STD)

- Long-Term Disability (LTD)

- Company-Paid Life Insurance

- Voluntary insurance programs including Life, Critical Illness, Hospitalization, Accident and Pet Insurance.

**Interested in opportunities in other Knight’s Companies locations?**

We’re hiring across our other markets:

- Lowcountry: Charleston/Jedburg/St. George/Moncks Corner

- Midlands: Columbia/Lexington/Irmo/Blythewood/Lugoff/Sumter

- South: Aiken/Hampton/Beaufort/Okatie/Richmond Hill/Savannah

Visit our careers page to explore all openings: **www.knightscompanies.com**

Join our team and be part of a company that values safety, hard work and professionalism. We offer a supportive work environment, opportunities for growth, and comprehensive benefits to help you succeed in your career.

EOE