Senior Design Engineer - HVAC Systems

Mantis Innovation•Los Angeles, AZ

1d•Hybrid

About The Position

Mantis Innovation provides managed facility services and turnkey program management with technology-enabled solutions covering building operations, energy procurement, sustainability, roofing, solar, HVAC, pavement, building-envelope systems, data centers, EV charging, lighting, and building management systems. The Senior Design Engineer (Mechanical/HVAC Systems) helps clients identify, design, and implement utility and infrastructure improvements that improve facility performance, reliability, and cost efficiency. The role leads technical assessments, feasibility analysis, project scoping, and engineering design to support informed investment decisions. It delivers accurate recommendations and technical solutions, with engineering support from concept through implementation. Success includes completing 95% of assigned surveys, studies, and investment-grade estimates by committed deadlines, with less than 5% requiring material rework; contributing to at least $5 million annually in qualified project opportunities; and collaborating responsively with clients, teams, and project partners. Work is performed in office, remote, and client-site settings. Client sites may include industrial facilities, commercial buildings, utility plants, mechanical rooms, construction sites, production areas, and rooftops. Regular local and regional travel is expected, and occasional overnight travel may be required. The position generally operates during standard business hours, with flexibility potentially needed for client schedules, site access, deadlines, commissioning, or field work outside normal hours.

Requirements

Bachelor’s degree in engineering or a related technical field.
5–10 years of experience in development, design, or delivery of utility system modernization, energy efficiency, or related infrastructure projects.
Experience supporting industrial and/or commercial projects.
Technical experience with utility, HVAC, mechanical, or related infrastructure systems.
Ability to independently manage engineering work and coordinate with clients, internal teams, and external partners.

Nice To Haves

PE license, Certified Energy Manager credential, LEED AP credential, or similar professional certification.
Strong financial and economic analysis skills, including lifecycle cost analysis, ROI evaluation, and development of business cases for capital infrastructure improvements.

Responsibilities

Conduct site surveys and collect technical, operational, utility, and cost data to establish project baselines and identify client needs.
Analyze facility infrastructure, utility systems, and operating conditions to identify energy, water, and operational improvement opportunities.
Perform feasibility studies and technical evaluations for utility modernization and energy efficiency solutions.
Develop project scopes, engineering assumptions, savings calculations, and investment-grade cost estimates.
Prepare technical recommendations, project economics, and supporting documentation for client proposals and decision-making.
Lead design engineering activities for approved projects, ensuring technical quality and alignment with project objectives.
Coordinate internal and external engineering resources to deliver design work on schedule and within scope.
Manage engineering support for project implementation, including design-build coordination, technical reviews, and integration of applicable incentives or funding opportunities.