Our Nuclear Programs is a Tier 1 service provider to the U.S. Department of Energy as well as commercial nuclear companies; we deliver safe and innovative solutions at complex nuclear cleanup, production and power generation sites. Our services include engineering, construction management, consulting, program management, decommissioning, environmental remediation, waste and nuclear material management, and nuclear operations. We’re looking for a Senior Structural Engineer for design projects, developing design calculations using standard and advanced analysis (FEA) techniques, developing construction drawings, and developing construction specifications for structures made of steel, concrete, and masonry with emphasis on seismic design. Your work will be performed in our Oak Ridge, TN office with some travel. You will be able to focus on tackling the toughest design challenges with a smile as you support the development of life changing infrastructure that improves communities all over the United States. If you're up for the task, then we have been looking for you! Join our team and help us lay the foundation for human progress. Join us and love what you do! Qualifications: - Sole US citizenship required (to comply with government customer requirements and/or applicable government regulations) - Having ability to obtain DOE Q clearance - B.S. in Structural/Civil Engineering from an ABET accredited engineering school - 8+ years of post-education experience - A PE is required with ability to obtain a new state license as required - Perform design and full documentation of structural systems as assigned - Interface directly with client counterpart, both virtually and on-site, to develop best solution for assigned projects - Integrate with other design disciplines and project functions such as Mechanical, Electrical, Architecture, Civil, Document Control, Project Controls, etc. - Ability to estimate, schedule, and track assigned project for schedule and cost performance - Knowledge of DOE, NRC, and nuclear standards including DOE-1020, NRC Regulatory framework, etc. - Expert design knowledge of steel, concrete, and masonry with emphasis on seismic design - Expert implementing multiple years of national code including IBC, AISC, ACI, ASCE 7 - Ability to follow and implement established quality procedures and ensure that all work accomplished is procedurally compliant - Experience working within an NQA-1 quality program - Expert in use of finite element software such as STAAD.pro (or equivalent) - Expert using Microsoft Office software including Teams, Outlook, Project, Word, Excel, etc. - Ability to learn new software as necessary for project success. - Expert in use of MathCAD (or equivalent) - Reside within a commutable distance from our Oak Ridge, TN office Preferred qualifications: - Experience using Revit, AutoCAD, or MicroStation software - Experience working in the field at a construction site - DOE Q clearance - DOE experience Work Location: It is preferred this position be worked full-time in the Oak Ridge, TN office. There is an option for remote/hybrid work. For people within 50 miles of the Oak Ridge, TN or Denver, CO offices, a hybrid option requiring a person to be in office a minimum of 2 days per week is available. For people outside of 50 miles, a remote option with some travel to the Oak Ridge, TN office is available. For hybrid and remote work, you are required to provide and work in a secured location as approved by the company within the United States due to the projects that you will be participating in. Essential Functions: Intermittent sitting, walking, standing, bending, squatting, climbing, kneeling, twisting, and lifting. Lifting requirements limited to 20 lbs. in the form of supplies, drawings, etc. Longest distance carried of 50 feet. Hand manipulation is required for simple grasping, pushing and pulling, and fine manipulation. Right and/or left hands utilized. Occasional need to reach and/or work above the shoulder, for supplies, as well as below the shoulder for same. No foot controls necessary. Must be alert to equipment in the field, there will be occasional travel, will work near construction job site equipment when in the field, occasional need to work near hazardous equipment and machinery, occasional need to walk on uneven ground, exposure to dust, gas or fumes, exposure to noise, extremes in temperature or humidity, and potential work at heights. We help prepare people for new opportunities and challenges. With positions at every level, openings in multiple disciplines, expertise in a range of markets and offices around the globe, we create an environment where you can learn, grow, and thrive. Equipment and Machines: Standard office PC, with software will be provided Travel required – As needed Compensation Details: $100,000 - $170,000 The compensation range or hourly rate listed for this position is provided as a good-faith estimate of what the company intends to offer for this role at the time this posting was issued. Actual compensation may vary based on factors such as job responsibilities, education, experience, skills, internal equity, market data, applicable collective bargaining agreements, and relevant laws. Benefits Overview: Our health and welfare benefits are designed to support you and your priorities. Offerings include: - Health, dental, and vision insurance - Paid time off and holidays - Retirement benefits (including 401(k) matching) - Educational reimbursement - Parental leave - Employee stock purchase plan - Tax-saving options - Disability and life insurance - Pet insurance Note: Benefits may vary based on employment type, location, and applicable agreements. Positions governed by a Collective Bargaining Agreement (CBA), the McNamara-O'Hara Service Contract Act (SCA), or other employment contracts may include different provisions/benefits. Original Posting: 03/30/2026 - Until FilledAmentum anticipates this job requisition will remain open for at least three days, with a closing date no earlier than three days after the original posting. This timeline may change based on business needs. Amentum is proud to be an Equal Opportunity Employer. Our hiring practices provide equal opportunity for employment without regard to race, sex, sexual orientation, pregnancy (including pregnancy, childbirth, breastfeeding, or medical conditions related to pregnancy, childbirth, or breastfeeding), age, ancestry, United States military or veteran status, color, religion, creed, marital or domestic partner status, medical condition, genetic information, national origin, citizenship status, low-income status, or mental or physical disability so long as the essential functions of the job can be performed with or without reasonable accommodation, or any other protected category under federal, state, or local law. Learn more about your rights under Federal laws and supplemental language at Labor Laws Posters.

• Work with some of the world’s largest technology companies and other mission-critical clients • Independently handle engineering and project management tasks on small to medium-sized projects, from conception to completion • Process design calculations, develop project scopes and schedules, and produce structural construction drawings and specifications • Coordinate with other Olsson teams, professional staff, technical staff, and clients

• Performing design reviews of civil/structural design components in support of the development of bid/construction packages for substation and transmission projects • Functioning as a senior engineer performing design reviews on a regular basis • Developing junior staff members • Contributing to bids and proposal development • Taking a responsible engineer role on main client projects, overseeing the work and ensuring quality control on design packages • Occasional site visits to client substation facilities may be required • Occasional travel for client meetings and industry-related events

• Serve as a project manager on some projects and lead design engineer on others • Prepare planning and design documents, process design calculations, and develop and maintain team and client standards • Lead quality assurance/quality control and act as an advisor on complex projects • Coordinate with other Olsson teams, professional staff, technical staff, clients, and other consultants • Travel to job sites for observation and attend client meetings