Mechanical Engineer - Oil and Gas

Who We Are Atwell, LLC is a bold leader in the consulting, engineering, and construction services industry, delivering a broad range of creative solutions to clients in the real estate & land development, and energy markets. We have a strong national presence and a diverse, award-winning project portfolio. Atwell is a privately owned company, with 2,000+ passionate team members across 75+ locations and growing! Atwell, LLC is a proud recipient of the following 2025 awards: Ten consecutive years in a row as a “Best Place to Work” by Zweig Group (#11) Recognized as #70 in the ENR Top 500 Design Firms, ranked in every region Recognized in Crain's “Fast 50” as one of the fastest-growing companies (#14) Recognized as the 2025 ENR Design Firm of the year for the Southeastern US Position Snapshot Atwell is hiring a mid-level Mechanical Project Engineer (PE) to support oil & natural gas, CO₂, hydrogen, and RNG pipeline and facility projects. This role focuses on mechanical design and project execution for large pipeline systems and facilities (meter stations, compressor stations, terminals, valve sites, pigging facilities). You’ll work from concept through construction/commissioning, coordinating across disciplines to deliver safe, compliant, and constructible solutions. Essential Functions Lead and support project teams on assigned tasks; provide technical guidance and implement client-requested design changes. Interface with clients, EPCs, vendors, and regulators; communicate scope, progress, risks, and design decisions. Coordinate with civil/structural/electrical/instrumentation/process teams to ensure integrated, constructible designs. Mentor junior engineers/designers; contribute to mechanical best practices, standards, and QA/QC. Travel to offices, vendor facilities, and jobsites as needed. Education / Credentials Bachelor’s degree in Mechanical Engineering (or related discipline). Professional Engineer (PE) license required (or ability to obtain promptly per state requirements). Day to Day Serve as the mechanical engineering lead or key contributor for pipeline and facility projects, including: Meter & regulator (M&R) stations, valve sites, pig launcher/receiver sites Compressor stations and station tie-ins Terminals, pump stations, and related facility upgrades/expansions Develop and own mechanical deliverables such as: Mechanical basis-of-design, design criteria, and equipment/system selections P&IDs, PFDs, line lists, and mechanical specifications (in coordination with process) Equipment data sheets and procurement packages (valves, meters, regulators, filters/separators, pumps, compressors packages interface, pigging components, heaters, coolers, heat exchangers) Piping isometrics, piping plans, tie-in packages, and installation details Perform/oversee engineering calculations and technical evaluations, including: Pressure design and code compliance Relief device sizing / overpressure protection support and coordination Hydraulic/line sizing coordination, equipment sizing support, and operating case reviews Support facility layout and integration: 3D model/design review participation as applicable; resolve clashes and support constructability Coordinate with structural/civil for foundation loads, pipe rack interfaces, and equipment anchorage Preferred Tools & Experience Strong experience with piping design, facility mechanical systems, and field execution support. Familiarity with AutoCAD, Bluebeam, Microsoft Office; exposure to 3D tools (Plant 3D, CADWorx, AVEVA, or similar) is a plus. Consulting/EPC experience and comfort working to owner/operator standards. Experience supporting projects in operating facilities Pay Range - $90,000 - $145,000 base + end of year bonus. Disclaimer While AI tools may support your application process, this role is built on human talent. Your judgment, experience, and character matter most, so we encourage you to showcase what makes you uniquely you. Atwell does not accept unsolicited resumes…