Finance & Accounting Intern (Summer 2026)

Wärtsilä is an innovative technology company known for being a forerunner in the Marine and Energy markets. Every day, we – Wärtsilians - put our hearts and minds into turning Wärtsilä's purpose of enabling sustainable societies through innovation in technology and services into reality. Our ultimate aim is to provide increased value to both our customers and society. New, game-changing ideas and continuous improvement have been part of our DNA since 1834. Together, we can create new business opportunities and more sustainable future that we can all be proud of. 

We want to transition the world towards a decarbonised and sustainable future. By pushing the boundaries of engineering and technology, we can make it work. We are always on the lookout for future-oriented talent – want to join the ride?

Wärtsilä's Finance & Accounting Department is seeking an enthusiastic and motivated Summer Intern to join our in-house Accounting team in Houston for the summer. This opportunity is ideal for rising 2nd and 3rd year Finance, Accounting, or Business students looking to immerse themselves in the field of Finance, Accounting, and Compliance. As an intern, you will support the team on a wide range of accounting matters, gain hands-on experience in a dynamic, international business environment, and work closely with our detail-oriented in-house accounting professionals.

Interns will contribute to meaningful projects, receive mentorship, and present their final outcomes to leadership.

Successful candidate must be able to work a hybrid role, with a minimum of 3 days per week in our Houston office.

Responsibilities:

• Assist with monthly closing and quarterly tasks, gain understanding of Financial Statements, and support presentations for monthly management meetings.
• Support corporate governance, regulatory compliance, business license filings, and corporate credit cards management.
• Help with accounts payable and receivable inquiries and assisting with audits as needed.
• Help with maintaining records, filing documents, and ensuring compliance with company policies.
• Participate in meetings with Finance and Tax advisors and external partners as needed.
• Perform any other Finance tasks and administrative duties as assigned.
• Participate in company volunteer and community service events.

Required Qualifications:

• Currently enrolled in an accredited U.S. business school, pursuing a Finance, Accounting, or Business degree, preferably as a rising sophomore or junior.

Preferred Qualifications:

• Strong interest in accounting & finance}
• Excellent communication skills, both written and verbal, in English (fluency in Spanish is a plus).
• Detail-oriented with strong organizational and time management skills.
• Ability to work independently as well as in a team environment.
• High level of integrity, professionalism, and confidentiality.
• Proficiency in Microsoft Office Suite (Word, Excel, PowerPoint).
• Prior internship or relevant experience in an accounting environment is a plus but not required.
• Advanced Excel skills.

Duration:
This is a paid full-time internship position for a duration of 3 months during the summer of 2026.

Start date:
The anticipated start date for this position is June 1, 2026.  Relocation support is not provided for this position.

What We Offer:
Joining our team means becoming part of an international endeavor towards sustainable societies and a renewable energy future. You will be a member of a dynamic and highly professional Finance in-house team, passionate about delivering high-quality services. This position offers significant growth opportunities in accounting expertise through exposure to a variety of accounting & financial tasks.

Last application date: 23/01/2026 

Candidates for regular U.S and Puerto Rico positions must be a U.S. citizen, national, or an alien admitted as permanent resident, refugee, asylee with valid work permit or temporary resident under 8 U.S.C. 1160(a) or 1255a(1). Individuals with temporary visas such as E, F-1, H-1, H1B, H-2, L, B, J, or TN or who need sponsorship for work authorization now or in the future, are not eligible for hire.

Individuals hired for positions that require on-site customer interactions and/or in-person travel may be required to be fully vaccinated against COVID-19 or other country-specific vaccinations, unless otherwise prohibited by law.

Please note that according to Wärtsilä policy, voluntary consent for a security check may be required from candidates being considered for this position, depending on the applicable country.

This is Wärtsilä 

Wärtsilä is a global leader in innovative technologies and lifecycle solutions for the marine and energy markets. Our team of 18,300 professionals, in more than 230 locations in 77 countries, shape the decarbonisation transformation of our industries across the globe. Read more on www.wartsila.com.