Systems engineer Jobs in Springfield, IL

Leidos Engineering LLC is a premier national engineering-based management consulting firm. We are seeking an experienced and motivated candidate to join our team as a Senior Energy Engineer. The position is ideal for a person with excellent technical skills and energy engineering experience with experience in calculating energy saving estimates, energy auditing, and communicating technical issues within the project team while working closely with contractors, suppliers, architects, and project engineers.

Primary Responsibilities:

• Reviewing technical energy efficiency applications for incentives and rebates for Ameren Illinois electric and natural gas customers
• Review different types of energy using systems within the industrial and/or commercial markets (HVAC, Lighting, compressed air systems, energy management systems, etc)
• Research technology changes to support improvements to the energy efficiency program and provide solutions for implementation improvements
• Maintain working knowledge of the Illinois Technical Reference Manual and associated energy efficiency concepts.
• Review existing energy savings methods for quality control/improvements
• Utilize independent judgment to verify technical requirements are met throughout various energy savings initiatives
• Coordinate & provide guidance to supporting teams regarding energy efficiency programs

Basic Qualifications

• Bachelor’s degree in engineering, Economics, Business Administration or related, with six plus (6+) years of relevant experience
• Prior experience in energy efficiency or similar technologies.
• Proficiency with Microsoft Office Products, especially Microsoft Excel
• Must be able to work cooperatively on a technical team, along with working with non-technical team members.
• Must have well developed communication skills and be able to express thoughts and ideas clearly and concisely in both verbal and written format.
• Strong planning, organization, time management, and team-building skills with demonstrated ability to make unanticipated changes to production deliverables required

Preferred Qualifications

• CEM or LEED certification
• Understanding of utility-offered products or services
• Focus on being able to see things through customer’s eyes to improve customer experience and satisfaction
• Experience working with commercial contractors
• Experience with Advanced Lighting and Controls, Commercial HVAC, Compressed Air, or Industrial Process technology
• Familiarity with the International Energy Conservation Code (IECC) or ASHRAE Efficiency Standards
• Experience with COMcheck, eQuest, Trane TRACE™, or Carrier HAP
• Experience with Customer Relationship Management (CRM) software
• Experience in the development and implementation of standards, procedures and guidelines for a process-oriented position.
• Excellent English oral and written communication skills.

Job Location: This position is a remote position. Ameren Illinois and Leidos believe it is very important to provide employment opportunity to the utility ratepayers that reside in Illinois. Therefore, there is strong preference for the successful candidate to be located in the Ameren Illinois service territory (roughly the southern two-thirds of Illinois). The Ameren Illinois service territory includes several large to mid-size communities such as Galesburg, Quincy, Peoria, Bloomington-Normal, Champaign-Urbana, Danville, Decatur, Springfield, Charleston-Mattoon, Effingham, Mt. Vernon, Marion, Carbondale, and Metro East (Belleville, O'Fallon, Granite City, Edwardsville, Alton, Collinsville).

Travel may also be required to the Peoria, IL and/or Collinsville, IL offices on a periodic basis.

If you're looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo — because the mission demands it. We're not hiring followers. We're recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We're already at step 30 — and moving faster than anyone else dares.

Original Posting:

September 21, 2026

For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above.

Pay Range:

Pay Range $73,450.00 - $132,775.00

The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.