Mechanical Engineer IV

Mechanical Engineer IV

Job Category: Engineering Requisition Number: MECHA003222

Posted: June 23, 2026

Full-Time

Locations: Rapid City, SD 57702, USA +6 more locations

Description

Job Summary:

Candidate will enhance technical skills performing introductory calculations and assisting in the preparation of pipeline design deliverables under the mentorship of senior engineers. The ideal candidate will be highly motivated, self-starter with the ability to work individually and in a team environment.

Job Duties and Responsibilities:

Lead engineer on DOT/PHMSA jurisdictional and non-regulated pipeline projects.

• Assist with client proposals, project schedules, and client communications.
• Ability to take on project engineer role and/or an interest in developing into project management role with experience.
• Interact extensively with regulatory agencies, project management, and designers to ensure exceptional, on-time deliverables.
• Interact with client, regulatory agencies, construction contractors, material vendors, and other stakeholders to develop cost-effective pipeline designs and low maintenance solutions.
• Develop engineering calculations, pipeline modeling, and simple and complex problem solving
• Support development of junior engineering staff through mentorship and guidance.
• Coordination with cross-discipline services related to the overall project lifecycle, including civil, mechanical, structural, environmental/cultural, survey, and electrical teams to ensure integrated design solutions.
• Perform additional responsibilities as required by business needs.

Be able to work in a team environment, take direction from supervisor(s), adhere to work schedules, focus on details and provide exceptional customer service to our clients.

• Development of design related calculations and direction of designers from basis of design through IFC plan sets and records compilation/audits.
• Perform hydraulic calculations, line sizing, pipe material grade and wall thickness selection, and Maximum Allowable Operating Pressure (MAOP) calculations.
• Provide QA/QC to plats, alignment sheets, P&IDs, pipeline facility designs, facility response plans, etc.
• Must have well developed organizational skills, be proficient in oral and written communications and be able to work with minimal supervision.
• Ability to work methodically and analytically in a quantitative problem-solving environment and demonstrated critical thinking skills
• Ensure designs align with industry codes, safety standards, and regulatory requirements.

Qualifications:

• Bachelor's degree in Mechanical Engineering or Engineering Technology from ABET accredited school.
• 5-10+ years of relevant experience
• Valid Drivers License
• Ability to balance multiple, fast pace projects through communication and prioritization of tasks.

Preferences:

• PE license

Experience in the design and construction of natural gas pipelines and/or facilities, potentially including:

• Clear understanding of relevant industry standards including API 610, 650, 653, ASME B31.3, B31.4, and B31.8, NFPA 30, DOT Part 192, DOT Part 193 and DOT Part 195
• Familiarity with natural gas and liquids pipeline design and details for measurement & regulation stations, mainline valves, and pigging stations.
• Pipeline hydraulic modeling
• Simple and complex HDD bore calculations and design
• Cold weather design experience

Working experience and application knowledge of pipeline safety regulations associated with US-DOT/PHMSA or State commissions

Working experience and application knowledge of United States DOT – 49 CFR Part 192, and 195, and applicable state pipeline safety regulations.

Working experience with Management of Change processes.

Working experience and knowledge of API – RP 1173 Pipeline Safety Management Systems, or other similar Industry management system process a plus.

Working experience and application knowledge of various pipeline industry related standards such as API, ASME, NACE and NFPA.

Physical Requirements:

The physical demands described represent those that must be met by an employee to successfully perform the essential functions of this job. Reasonable accommodations may be made to enable individuals with disabilities.

The employee is regularly required to:

• Sit, stand, walk, stoop, kneel, twist, crouch, and crawl.
• Use hands to handle, or feel objects, tools, or controls; and reach with hands and arms.
• Talk or hear and communicate clearly.

The employee must:

• Be able to occasionally walk on uneven terrain up to two miles per day.
• Frequently lift and move up to 10 pounds and occasionally lift and move up to 25 pounds and infrequently up to 50 pounds.
• Specific vision abilities required by this job include close vision, color vision, depth perception, and the ability to adjust focus.

What else you need to know

This job description is not meant to be all-inclusive or restrictive and other duties may be assigned. It is a description of the job as presently defined and is subject at any time to revision. This document is intended to describe the general nature and level of work being performed by individuals assigned to this classification. This is not to be construed as an exhaustive list of all responsibilities, duties, and skills required. Individuals may be required to perform duties outside of their normal responsibilities, as needed.

At KLJ, we have a vested interest in the personal, financial, and professional goals of our employees. We offer a competitive full suite benefit package including health, dental, vision, and life insurance, performance bonus, 401k, employee stock ownership program and a flexible work environment that gives you options to support excelling both professionally and personally. The options available for the current year are described at

All applicants must be authorized to work in the US, without employer-sponsorship. KLJ does not sponsor individuals for employment-based visas and does not participate in any OPT training program.

KLJ will not be partnering with third-party recruiters on this position. Please review our third-party recruiting policy at

Position will be posted until filled.

Equal Opportunity Employer/Protected Veterans/Individuals with Disabilities This employer is required to notify all applicants of their rights pursuant to federal employment laws. For further information, please review the Know Your Rights notice from the Department of Labor.