OTHER

FEED

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LS Power actively invests in and scales businesses that are meeting the growing needs of the energy expansion, including electric vehicle charging, demand response, microgrids, renewable fuels and waste-to-energy platforms. Founded in 1990, LS Power is a premier development, investment, and operating company focused on the North American power and energy infrastructure sector, with leading platforms across generation, transmission and energy expansion solutions.

Overview:
About us:Founded in 1990, LS Power is a premier development, investment, and operating company focused on the North American power and energy infrastructure sector, with leading platforms across generation, transmission and energy expansion solutions. Since inception, LS Power has developed or acquired 50,000 MW of power generation, including utility-scale solar, wind, hydro, battery energy storage, and natural gas-fired facilities. Through its transmission business, LS Power Grid, the company built and operates 780+ miles of high-voltage transmission and 7 transmission utilities and has another 375+ miles currently in construction or development. LS Power actively invests in and scales businesses that are meeting the growing needs of the energy expansion, including electric vehicle charging, demand response, microgrids, renewable fuels and waste-to-energy platforms. Over the years, LS Power has raised more than $76 billion in debt and equity capital to support North American infrastructure. Our Purpose, Mission, & Values:Our Purpose is to solve complex energy problems that improve the worldOur Mission is to make lives better by developing a cleaner and more reliable energy ecosystemOur Values are the willingness to participate in and help strengthen our culture of integrity, Innovation, Teamwork, and Taking Ownership Our People create value and are our Most Valuable asset.  We take our values of Integrity, Innovation, Teamwork and Taking Ownership seriously and ask candidates to think about how they can help us further enhance our culture with their specific skillsets, capabilities and experiences. About the Role:LS Power is seeking a Transmission Planning Engineer Intern to join our team in Chesterfield, MO. This internship provides hands-on exposure to transmission system planning and grid development initiatives in a rapidly evolving energy market.As the Transmission Planning Engineer Intern, you will work alongside experienced engineers and development professionals to support technical studies and analysis that help ensure grid reliability and enable infrastructure growth.

Responsibilities:
What you will do: <ul><li>Support transmission system planning and reliability studies</li><li>Assist with power flow and contingency analysis</li><li>Support interconnection and grid impact assessments</li><li>Review ISO/RTO planning processes and documentation</li><li>Analyze data related to load growth, generation additions, and system constraints</li><li>Assist in preparing technical reports and internal presentations</li></ul> 

Qualifications:
We want you on our team because you…<ul><li>Are currently pursuing a Bachelor’s or Master’s degree in Electrical Engineering</li><li>Have completed coursework in power systems or transmission planning</li><li>Demonstrate strong analytical and problem-solving skills</li><li>Have an interest in power systems, grid reliability, and energy infrastructure</li><li>Communicate effectively and work well in a team environment</li></ul>Ideally, you have<ul><li>Familiarity with power system modeling tools (PSSE, TARA, PSLF, PowerWorld or similar)</li><li>Strong Excel and data analysis skills</li><li>Interest in energy markets and infrastructure development</li></ul>

LS Power Development, LLC

Transmission Planning Engineer Internship

Alternative Fuels

Analysis Skills

Communication Skills

Construction

Data Analysis

Documentation Plan

Ecosystems

Electrical Engineering

High Voltage (HV)

ISO (International Organization for Standardization)

Microsoft Excel

Natural Gas

Power Generation

Power Transmission

Problem Solving Skills

Registered Training Organisation (RTO)

Reporting Skills

Systems Reliability

Team Player

Technical Support

[AW]-iCims

This is an excellent opportunity for a student pursuing a degree in Accounting, Finance, or Business Administration who wants meaningful real-world accounting experience beyond basic administrative tasks. This internship offers hands-on experience in accounting operations, payroll support, accounts payable/receivable, job costing, and construction accounting within a fast-paced HVAC environment.

HOUR

Summer Accounting InternDuration: May 2026 - August 2026Schedule: Part-Time or Full-Time Summer InternshipCrystal Heating & Cooling Service, Inc. is seeking a motivated and detail-oriented Summer Accounting Intern to support our Accounting Department during our busy summer season. This internship offers hands-on experience in accounting operations, payroll support, accounts payable/receivable, job costing, and construction accounting within a fast-paced HVAC environment.This is an excellent opportunity for a student pursuing a degree in Accounting, Finance, or Business Administration who wants meaningful real-world accounting experience beyond basic administrative tasks.Key Responsibilities<ul><li>Assist with Accounts Payable processing, invoice entry, and vendor file maintenance.</li><li>Support Accounts Receivable activities, including customer payment application and collections follow-up</li><li>Help reconcile credit card statements, bank transactions, and general ledger accounts</li><li>Assist with payroll preparation, reporting, and audit support</li><li>Support construction and union-related accounting functions, including equality funds processing, union reporting, prevailing wage documentation, and compliance tracking</li><li>Suppothe rt month-end close processes and preparation of journal entries</li><li>Organize and maintain accounting and employee documentation</li><li>Assist with job costing and financial data entry in ServiceTitan and QuickBooks</li><li>Prepare spreadsheets, reports, and financial analysis using Microsoft Excel</li><li>Support internal process improvement and special accounting projects</li><li>Assist with filing, scanning, and maintaining accurate accounting records</li><li>Maintain confidentiality of sensitive financial and employee information</li></ul>Qualifications<ul><li>Currently pursuing an Associate's or Bachelor's degree in Accounting, Finance, or Business Administration.</li><li>Basic understanding of accounting principles and financial statements</li><li>Strong attention to detail and organizational skills</li><li>Proficient in Microsoft Excel and Microsoft Office Suite</li><li>Ability to prioritize tasks and work independently in a deadline-driven environment</li><li>Strong communication and professionalism</li><li>Willingness to learn and take initiative</li></ul>Preferred Qualifications<ul><li>Prior office, bookkeeping, or internship experience preferred but not required.d</li><li>Experience with QuickBooks, ServiceTitan, or ERP/accounting systems is a plus.</li><li>Interest in construction, HVAC, or operational accounting environments</li></ul>What You'll Gain<ul><li>Hands-on accounting and finance experience in a growing company</li><li>Exposure to real-world month-end close and financial reporting processes</li><li>Experience with job costing and operational accounting</li><li>Exposure to union, prevailing wage, and construction compliance accounting processes is rarely offered in traditional internships</li><li>Mentorship from experienced accounting leadership</li><li>Opportunity to build professional skills in communication, organization, and problem-solving</li></ul>Compensation<ul><li>Paid internship ($18-$22/hour based on experience)</li><li>Flexible scheduling available</li></ul>About Crystal Heating & Cooling Service, Inc.Crystal Heating & Cooling Service, Inc. is a 100% employee-owned (ESOP) HVAC company serving residential and commercial customers throughout Missouri. We are committed to teamwork, integrity, growth, and delivering exceptional service to our customers and employees alike.

Crystal Heating and Cooling

Summer Accounting Intern

Accounting

Accounting Close

Accounting Policies

Accounting Software

Accounts Payable

Accounts Receivable

Administrative Skills

Billing

Bookkeeping

Business Administration

Construction Support

Credit Cards

Credit and Collections

Customer Support/Service

Data Entry

Detail Oriented

Documentation

ERP (Enterprise Resource Planning)

Establish Priorities

File Maintenance

Finance

Financial Analysis

Financial Reporting

Financial Statements

Financial Transactions

General Ledger Accounting

HVAC

Intuit Quickbooks

Journal Entries

Leadership

Maintain Compliance

Maintenance - HVAC

Mentoring

Microsoft Office

Operational Support

Organizational Skills

Payroll Accounting

Process Improvement

Reconciliation

Record Keeping

Service Delivery

Spreadsheets

Time Management

Talent Acquisition

AI & Automation at Sargent & Lundy: In this role, we expect people to be willing or able to solve problems using modern tools: You are expected to take engineering problems from issue to solution using data and modern tools such as automation and AI to improve workflows, reduce rework, and deliver cost-effective designs. Many engineers in these roles build or use automation to create calculations, summarize technical documents, or draft design documentation, including appropriate use of agentic AI tools, with strong engineering judgment and verification of results.

YEAR

Description:
This position allows for a hybrid work schedule with a mix of work spent in office and working remote from home. This position is based in our Clayton, Missouri office, located within the St. Louis metropolitan area. This position will offer you the ability to directly apply your knowledge of transmission line engineering including, conductors, hardware, insulation, structures, foundations and electrical principles to:<ul><li>Design transmission lines in the 69kV to 765kV range. </li><li>Perform structural analysis and design of pole, lattice, framed, and guyed structures.</li><li>Perform foundation designs.</li><li>Perform conductor selection studies, shielding, grounding and induction studies.</li><li>Develop cost estimates and schedules and prepare specifications for the procurement of transmission line materials and construction. </li><li>Specify transmission line components.</li><li>Model transmission lines in PLS-CADD, determine right of way requirements, calculate conductor sags, and develop transmission line plan and profile drawings. </li><li>Review vendor submittals.</li></ul>

Qualifications:
We do not sponsor employees for work authorization in the U.S. for this position. Essential skills and experience:<ul><li>This position requires a degree from an ABET-accredited engineering program.</li><li>Related engineering, internship or co-op work experience.</li><li>Proficiency with PLS-CADD and PLS-POLE.</li><li>Three or more years related experience in transmission line engineering.</li><li>Knowledge of the practical application of engineering principles including basic transmission line engineering.</li><li>Knowledge of design techniques, tools, and principles involved in the production of technical plans, drawings, and models.</li><li>Proficiency with MS Office applications. </li><li>Excellent written and verbal communication skills.</li></ul>Valued but not required skills and experience:<ul><li>Successful completion of the Fundamentals of Engineering (FE) exam, and designation as an Engineer in Training.</li><li>Proficiency with any of the following programs: PLS-TOWER, SAG10, LPILE, MFAD, ArcGIS, CDEGS, AutoCAD, Microstation.</li><li>Experience in writing and providing support documentation for engineering calculations.</li><li>Familiarity with design codes and standards such as NESC, IEC, CSA, IEEE, ANSI, IBC, ASCE 7, AISC, and ACI 318.</li></ul>

AI & Automation at Sargent & Lundy:
In this role, we expect people to be willing or able to solve problems using modern tools:<ul style="margin-top:0in"><li>You are expected to take engineering problems from issue to solution using data and modern tools such as automation and AI to improve workflows, reduce rework, and deliver cost-effective designs.</li><li>Many engineers in these roles build or use automation to create calculations, summarize technical documents, or draft design documentation, including appropriate use of agentic AI tools, with strong engineering judgment and verification of results.</li><li>Programming or scripting (e.g., Python, MATLAB, advanced Excel) to automate calculations, design checks, reporting, or data transformation is valued but not required.</li><li>We also value additional learning, such as a minor, certificate, or other training in Computer Science, Artificial Intelligence, Software Engineering, or related fields that helps you apply automation or agentic AI to real engineering problems.</li></ul>

Award-Winning Benefits:
At Sargent & Lundy, we care about the health and well-being of our employees. Our commitment extends beyond the workplace, offering comprehensive healthcare plans and generous paid time off to support our team members in every aspect of their lives. We understand the importance of work-life balance, which is why we are proud to provide competitive, award-winning benefits. Our dedication to employee satisfaction has earned us the prestigious Top Workplaces Culture Excellence Award for compensation and benefits in 2022, 2023, and 2024. <table><tbody><tr><th>Health & Wellness</th><th>Financial Benefits</th><th>Work-Life Balance</th></tr><tr><td><ul style="margin-top:0"><li>Health Plans: Medical, Dental, Vision</li><li>Life & Accident Insurance</li><li>Disability Coverage</li><li>Employee Assistance Program (EAP)</li><li>Back-Up Daycare</li><li>FSA & HSA</li></ul></td><td><ul style="margin-top:0"><li>401(k)</li><li>Pre-Tax Commuter Account</li><li>Merit Scholarship Program</li><li>Employee Discount Program</li><li>Corporate Charitable Giving Program</li><li>Tuition Assistance</li><li>First Professional Licensure Bonus</li><li>Employee Referral Bonus</li></ul></td><td><ul style="margin-top:0"><li>Paid Annual Personal/Sick Time (PST)</li><li>Paid Vacation</li><li>Paid Holidays</li><li>Paid Parental Leave</li><li>Paid Bereavement Leave</li><li>Flexible Work Arrangements</li></ul></td></tr></tbody></table>

Compensation Range:
$74,353 - $113,595

Transparency Statement:
Sargent & Lundy discloses compensation ranges that comply with all local and state regulations. The total compensation package for eligible positions will include a base salary or an hourly rate and a comprehensive benefits package, reflecting our commitment to rewarding performance and supporting the overall well-being of our employees. Individuals may also be eligible to participate in our yearly discretionary bonus.

Awards & Recognition:
<img alt="Top Workplaces USA Banner 2021-2023" src="https://sargentlundy.icims.com/icims2/servlet/icims2?module=AppInert&action=download&id=184599&hashed=-918588458"/>

Equal Opportunity:
Sargent & Lundy is an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, national origin, disability status, protected veteran status, or any protected status as defined by applicable law.

Internship Construction Jobs in Saint Louis, MO

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Internship Construction Jobs in Saint Louis, MO

Transmission Planning Engineer Internship LS Power Development, LLC

Summer Accounting Intern Crystal Heating and Cooling

Transmission Line Engineer 3 - Grid Sargent & Lundy

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