About Integrated Service Company

Integrated Service Company, LLC, is a trusted leading company in the Refining and Petrochemical industry, and we deliver efficiency and quality in all of our services: Field Services, Construction & Turnaround Services, Manufacturing Services, Tank Services, Tank Inspection Services, and Heater Services.

We hire only the most qualified professionals, and we work with suppliers worldwide to ensure our products are superior, so you can be sure the job will be completed quickly and the work will be top-quality. Our processes are safety-oriented, environmentally sound, and cost-effective. Best of all, we can be on the road in mere hours with the high-quality supplies and skilled professionals to fix any on-site problem.

Check out our services or contact us now if you have a problem that needs fixing.

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Interested in Working for InServ?

When units fail, pipes burst, or tanks spring a leak, our clients look to InServ and our teams of skilled professionals to hit the ground running and fix the problem with speed and efficiency. InServ is always recruiting skilled professionals in the following areas:

  • Boilermakers
  • Fitters
  • Welders
  • Helpers
  • Hole/Fire Watch

Our network of job sites spans the country, so you could have job opportunities near you now or in the future regardless of where you live. Working with InServ can also be a great opportunity to travel the country and work with a variety of companies.

If you share our passion for efficiency, quality, and safety, we want you on our team. If you have questions, call 918-879-2660 (InServ) or 918-437-4400 (CTS).

apply now
hard hat welding

Some of Our Clients:

Cenex Harvest States
Coffeyville Resources
Flint Hills Resources
Holly Frontier
Lion Oil
Phillips 66

InServ News

InServ Tank Division is accepting applications for the position of Engineer. Please send resumes to dmatlock@inservusa.com.

Essential Functions:
• Perform design work for tanks, floating roofs, foundations and basic structural systems.
• Provide support to field operations for API, AWWA and ASME tank and vessel work.
• Perform design and analysis using MathCAD.
• Perform fitness for services analyses for tanks and vessels.
• Perform analysis for API tanks, such as seismic analysis and finite element analysis.
• Perform floating roof analysis per API-650.
• Perform API-653 tank shell settlement analysis.
• Perform other related duties, as directed.

• BS in Engineering required.
• 4+ years related engineering experience preferred; civil or mechanical engineering background preferred.
• Working knowledge of MathCAD, AutoCAD, preferred.
• Advanced knowledge of strength of materials and numerical methods of structural analysis and stress analysis preferred. Finite element analysis (FEA) experience a plus.
• Demonstrated problem solving skills in applying design and analysis knowledge to field issues.
• Design experience in API-620, API-650, API-653, and ASME Section VIII strongly preferred.
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InServ Field Service needs welders and fitters for field work. Call Sarah at 918-234-5486. ... See MoreSee Less

Integrated Service Company is accepting applications for Manager - Port City Industrial Tooling

This position is responsible for planning, coordinating and directing the supply of tools and equipment from purchase through delivery to the job site. The successful candidate will possess experience in Procurement, Warehousing Systems, Inventory Control, and Equipment Maintenance as well as the ability to balance multiple projects and be proficient in Microsoft Word, Excel and Outlook. Interested candidates should send resumes to Resumes@inservusa.com
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Great Southern Technologies, LLC, an InServ Company seeking:


The Process Engineer / Field Technician position is involved in the revamp, study and start-up projects within the company. This includes an array of job responsibilities, learning opportunities along with industry exposure. To best service this position, the individual(s) must have process design experience, fulfill required traveling to the field both domestic and international, provide support to sales efforts, and the mechanical department when needed.

With the above requirements, the individual will need to posses innovative thinking for process design challenges, self motivated and have the ability to handle multiple projects simultaneously, These items are essential to the support and success of Great Southern Technologies. Currently, the average amount of field travel time is an estimated 20-25% of the position. The requirement to travel may occur at a moments notice. The remaining time will be spent performing the below responsibilities.

Process Engineer / Field Technician Responsibilities In Order of Precedence

1. Process Engineer
a. Complete fired heater thermal ratings for design and evaluation
b. Complete fired heater datasheets
c. Prepare Field Study Reports
d. Develop & Improve Current Technologies & Procedures

2. Sales Support
a. Develop proposal packages
b. Estimating
c. Build Client / Vendor Relations
d. Prepare and co-perform presentations to clients
e. Evaluate Vendor Designs

3. Field Service
a. Perform field testing and balance heaters
b. Provide start-up assistance
c. Witness burner tests
d. Co-Instruct operator training courses and heater school classes
e. Take dimensional measurements

The ultimate goal for this individual is to develop technically and professionally to eventually:

1) Self manage and develop proposals
2) Field Study Leader and project manager
3) Build Company/Individual market base
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InServ - Integrated Service Company added a new photo. ... See MoreSee Less

Contact Info

Integrated Service Company
1900 N 161st East Ave
Tulsa, OK 74116

Integrated Service Company - Texas
10603 Langston Drive
Mont Belvieu, TX 77523

Construction & Turnaround Services
1900 N 161st E Ave, Suite B
Tulsa, OK 74116

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