Demo

Sr. Mechanical Engineer

JSG (Johnson Service Group, Inc.)
Ogden, UT Contractor
POSTED ON 7/25/2026
AVAILABLE BEFORE 7/11/2027
Full Time office

Work Location: Ogden, UT

US Citizenship Required

Security clearance is required (active or ability to obtain); staffing agency must be eligible and authorized to sponsor and hold clearance for their employee.

Project Overview

Engineering, Procurement, and Construction (EPC) partner on the Northrop Grumman team to deliver the Sentinel Program, which is modernizing the ground-based leg of the U.S. nuclear deterrent triad, including intercontinental ballistic missile (ICBM) systems and launch infrastructure. Scope of service in Sentinel’s current Engineering & Manufacturing Development phase focuses on the ground infrastructure component of the program. A major contractor for the United States and allied governments, Bechtel has handled such efforts as chemical weapons demilitarization projects, missile-defense, infrastructure, base operations, procurement and project management, and restoration and recovery spanning half a century. We use our expertise to help our customers securely and effectively transform mission delivery.

Job Summary

In this role, you will prepare design and procurement documents for the Sentinel Project. This position has technical responsibility for interpreting, organizing, and coordinating the design as it pertains to chilled water systems and unique requirement driven equipment. The ideal candidate will have solid experience in piping system and equipment design and will be capable of developing design documents and procurement documents, including Specifications, Material Requisitions, Piping and Instrumentation diagrams and equipment data sheets as well as strong organizational and teamwork skills and proven problem-solving capabilities. You will be interfacing and coordinating with other engineering disciplines and the client in the development of the design.

Major Responsibilities

Prepare and check design and procurement documents including but not limited to P&IDs, supporting calculations, data sheets, engineering specifications, and material requisitions

Prepare specifications and data sheets for unique, requirement driven equipment, perform as the technical representative for the associated purchase order or subcontract, review vendor submittals, and manage the selected supplier’s technical performance

Evaluates, selects, and applies standard mechanical engineering methods, techniques, procedures, and criteria to support engineering design decisions

Designs, develops, modifies, and evaluates mechanical components and processes utilizing relevant Engineering Department Procedures (EDPs), design standards and guides

Coordinates mechanical engineering efforts in assigned areas with specialty groups, engineering disciplines, the client, vendor, contractors, construction and other functional groups

Prepares conceptual studies, designs, reports, or proposals

Provides technical assistance to other mechanical personnel and interacts with project functions, the customer, and regulatory agency personnel in the resolution of complex regulatory issues and industry codes and standards

Assists project and construction management in identifying and complying with project mechanical requirements and in addressing issues as they arise during project execution

Prepares mechanical engineering reports for clients as required

Mentors and assists more junior mechanical team members

Completes mechanical documentation and procedures for installation and maintenance

Selects components and equipment based on analysis of specifications and reliability

Education And Experience Requirements

Level 1 - Requires a bachelor's degree (or international equivalent) in Mechanical (or related) Engineering and a minimum of 5 years of relevant professional work experience.

Level 2 - Requires a bachelor's degree (or international equivalent) in Mechanical (or related) Engineering and a minimum of 8 years of relevant professional work experience.

Required Knowledge And Skills

Experience in Piping and Instrument Diagram (P&ID) development, chilled water system design, pipe sizing calculations, and equipment specification and procurement development for waste processing, nuclear, refinery, power, or chemical process facilities.

Experience with developing custom equipment packages, including skid mounted systems and specialty items, such as security doors.

Experience working on DOD government projects and with the Unified Facilities Criteria (UFCs).

Experience in working with procedures meeting quality assurance programs such as ASME NQA-1, or AS9100D.

U.S. Professional Engineering License in Mechanical Engineering (or ability to obtain within 12 months).

Must be a U.S. Citizen.

Must be able to complete and pass a pre-employment drug and background check, which includes verification of employment and education.

Security clearance is required (active or ability to obtain); staffing agency must be eligible and authorized to sponsor and hold clearance for their employee.

JSG offers medical, dental, vision, life insurance options, short-term disability, 401(k), weekly pay, and more. Johnson Service Group (JSG) is an Equal Opportunity Employer. JSG provides equal employment opportunities to all applicants and employees without regard to race, color, religion, sex, age, sexual orientation, gender identity, national origin, disability, marital status, protected veteran status, or any other characteristic protected by law.

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