Top 191 Summer internship Jobs in Arlington, Va

Summer Intern
CGC —Washington, DC
- $25 - $45 an hour
- Seasonal
- Computer Science
- Bachelor of Science
- Research
Quick Apply
Intern, Government Affairs (Summer 2027)
Delta Airlines —Washington, DC
- $22.56 an hour
- Seasonal
- Microsoft Word
- Microsoft Excel
- Office
- Profit sharing
- Flexible spending account
5d
Internship (Fall 2026)
Committee for a Responsible Federal Budget —Washington, DC
- $18.40 an hour
- Email
- Office
- Analysis skills
- Internship
Summer 2027 Internship Program - Accounting Internship
Kearney & Company —Alexandria, VA
- $18 - $28 an hour
- Seasonal
- Remote
- Computer Science
- Bachelor of Science
- Office
- Family leave
6d
Summer 2027 Internship Program - Kearney Technology Group Internship
Kearney & Company —Alexandria, VA
- $18 - $28 an hour
- Seasonal
- Remote
- Computer Science
- Bachelor of Science
- Office
- Family leave
6d
Paid Summer Sales Internship - No Experience + Training
Lotus Sales —Arlington, VA
- Seasonal
- No experience needed
- Internship
- Leadership
Quick Apply
INTERN
Scott Circle Communications —Washington, DC
- $22 an hour
- Part-time
- Hybrid work
- Google Workspace
- Computer literacy
- Research
Accounting Intern
EdgeConneX —Herndon, VA
- $23 an hour
- Research
- Continuous improvement
- Data entry
Quick Apply
Communications Internship
I.M.P. —Washington, DC
- $18.50 an hour
- Management
- Research
- Office
Art Internship
I.M.P. —Washington, DC
- $18.50 an hour
- Internship
- Entry level
Intern, Member & Partner Engagement (MPE)
National League Of Cities —Washington, DC
- $19 - $21 an hour
- Research
- Organizational skills
- Business
ETI Intern
NDIA —Arlington, VA
- $15 an hour
- Hybrid work
- Writing skills
- Office
- AI
Quick Apply
2026 Summer Intern: U.S. Immigration Policy and Community Engagement
Refugees International —Washington, DC
- Writing skills
- Organizational skills
- Internship
Summer 2027 Internship Program - IT Audit Internship
Kearney & Company —Alexandria, VA
- $18 - $28 an hour
- Seasonal
- Remote
- Computer Science
- Bachelor of Science
- Office
- Family leave
6d
2026 Summer Internship: Horn of Africa
Refugees International —Washington, DC
- Writing skills
- Administrative experience
- Organizational skills
Intern, Center for Municipal Practice
National League Of Cities —Washington, DC
- $19 - $21 an hour
- Writing skills
- Internship
- Communication skills
Intern, WID
NATIONAL DEFENSE INDUSTRIAL ASSOCIATION —Arlington, VA
- $15 an hour
- Writing skills
- Research
- Office
Quick Apply
Construction Project Management Intern
Smoot Construction Company of Washington, DC —Washington, DC
- $27 an hour
- Microsoft Excel
- Construction site
- Office
Quick Apply
Intern Operations and Infrastructure
National League Of Cities —Washington, DC
- $19 - $22 an hour
- Salesforce
- Research
- Finance
Legal Intern Summer 2026
Healthcare Legal Solutions LLC —Washington, DC
- $22 an hour
- Seasonal
- Microsoft Excel
- Writing skills
- Organizational skills
Quick Apply

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Summer Intern

CGC -
Washington, DC

Quick Apply

Job Details

Seasonal | Internship
$25 - $45 an hour

Qualifications

Research

Full Job Description

About CGC

CGC is a nonprofit investment firm that finances and originates clean energy, water, and resilient infrastructure projects to accelerate clean air, clean water, and affordable energy for communities across America.

We collaborate with the public and private sectors to bridge financing gaps and mobilize private capital into projects that deliver measurable economic and environmental impact at scale. Every dollar we invest is structured to multiply, generating durable returns for people, markets, and the environment.

Over the past decade, CGC has demonstrated the power of public-private investment by helping catalyze economic accelerators nationwide and mobilizing billions of dollars toward affordable clean energy and resilient infrastructure. Our model fills market gaps, unlocks private capital, and proves that economic growth and environmental progress can advance together.

A Career at CGC

A career at the CGC is grounded in impact. Our six core values guide how we invest and how we work together.

Innovation drives creative solutions and continuous improvement.
Mission-Driven Focus keeps long-term impact at the center of every decision.
Partnership shapes how we mobilize capital and build trust-based relationships.
Accountability defines our stewardship and commitment to results.
Collaboration strengthens cross-functional teamwork and shared responsibility.
Transparency ensures open communication and integrity in how we operate.

Our culture is fast-paced, rigorous, and purpose-driven. If you are motivated by solving complex challenges, building new markets, and delivering measurable impact within a collaborative team, CGC offers a platform to do that work with purpose.

Summer Internship Program

Finance & Operations Support

Location: Washington, DC | New York, NY | Boulder, CO | Walnut Creek, CA
Duration: July – August, 8–12 weeks
Compensation: $25.00 – $45.00 per hour, based on experience and qualifications
Application Deadline: Open until filled

Program Overview

The CGC Summer Internship Program is a structured, mission-driven experience designed to provide meaningful, hands-on exposure to CGC's finance, accounting, and operational work. Interns will support one of CGC's divisions based on organizational priorities and business needs.

This internship provides an opportunity to contribute to real projects, gain exposure to cross-functional collaboration, and support work connected to CGC's clean energy, infrastructure, finance, and operations priorities.

The program is designed to deliver:

Clearly defined scope of work and responsibilities
Direct supervision and mentorship
Exposure to cross-functional collaboration
Professional development opportunities
A capstone presentation to senior leadership at the conclusion of the program

Exceptional interns may be considered for future employment opportunities aligned with organizational needs.

Key Responsibilities

Responsibilities will vary by division but may include:

Supporting active projects aligned with CGC's clean energy and infrastructure investment initiatives
Conducting research, financial analysis, modeling, data analysis, or operational analysis
Assisting with preparation of reports, presentations, internal documentation, and process materials
Participating in cross-functional meetings and strategic discussions
Contributing to deliverables tied to defined learning objectives
Supporting finance, accounting, and operational projects as needed

For interns supporting the Finance and Operations Division, responsibilities may include:

Assisting with tying out financial statements and footnotes for the FY 2025 audit, including footing and cross-footing documents and confirming disclosed amounts match the trial balance
Auditing the contract database and reconciling information against vendor invoicing
Assisting with balance sheet reconciliations during the month-end close process
Reconciling timecards within payroll system reports and noting any differences
Auditing grant draw files against accounting records
Supporting the Controller with documenting processes and procedures related to managing investments from an internal control and accounting perspective
Reviewing travel and expense submissions to identify grant expense eligibility
Assisting with implementation and testing related to Accounts Payable and Procurement projects
Supporting other ad-hoc finance, accounting, and operations projects as assigned

Each intern will have a designated supervisor and clearly outlined deliverables.

Minimum Qualifications

Candidates must meet one of the following education levels:

Enrolled in a Bachelor's Program – Junior or Senior Status

Currently enrolled in an accredited BA/BS program
Entering junior or senior year at the time of the internship

Bachelor's Degree Graduate

Completed a BA/BS degree from an accredited institution

Enrolled in a Master's Program

Currently enrolled in an accredited Master's program
At least one semester, or equivalent, remaining at the time of application

Master's Degree Graduate

Completed a Master's degree from an accredited institution

All candidates should demonstrate:

Strong academic performance
Interest in clean energy, infrastructure finance, public-private investment, mission-driven finance, accounting, or operations
Strong analytical, communication, and organizational skills
Ability to work in a fast-paced, collaborative environment
Attention to detail and ability to follow processes accurately
Comfort working with spreadsheets, reports, and internal documentation

Preferred Areas of Study

Finance, Accounting, Economics, or Business Administration
Mathematics, Statistics, Data Science, or Quantitative Finance
Computer Science, IT, Cybersecurity, or Financial Technology

Program Structure

Hands-on project work within assigned division
Dedicated mentorship and structured oversight
Professional development sessions and networking exposure
Final capstone presentation and recognition event

Application Process

All candidates must apply through CGC's Careers Portal.

Applicants should submit:

Resume/CV
Cover letter outlining interest in the program and career goals

Shortlisted candidates will be invited to interview. Final selections will be made on a rolling basis.

Candidates must be legally authorized to work in the United States at the time of hire and throughout their employment. CGC does not currently sponsor employment visas and is unable to support work authorization that is time-limited or employer-restricted.

CGC is an Equal Opportunity Employer committed to building an inclusive workplace and advancing equitable economic and environmental outcomes nationwide.

We consider all qualified applicants without regard to race, color, religion, sex, national origin, age, disability, veteran status, or any other protected characteristic.

Quick Apply

Refine Your Search

summer internship jobs in arlington, va

Summer Intern

Intern, Government Affairs (Summer 2027)

Internship (Fall 2026)

Summer 2027 Internship Program - Accounting Internship

Summer 2027 Internship Program - Kearney Technology Group Internship

Paid Summer Sales Internship - No Experience + Training

INTERN

Accounting Intern

Communications Internship

Art Internship

Intern, Member & Partner Engagement (MPE)

ETI Intern

2026 Summer Intern: U.S. Immigration Policy and Community Engagement

Summer 2027 Internship Program - IT Audit Internship

2026 Summer Internship: Horn of Africa

Intern, Center for Municipal Practice

Intern, WID

Construction Project Management Intern

Intern Operations and Infrastructure

Legal Intern Summer 2026

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