Administrative Assistant — Internship

Are you looking to start your administrative career in a solid, international company that is a leader in its industry? If you are a student ready to gain real hands-on experience in a multinational environment, this internship could be the opportunity for you.

Tennant is a global leader in industrial cleaning solutions, and we are looking for an Administrative Assistant Intern to join our team in Agualva-Cacém, Portugal. You will work alongside an experienced team and play a hands-on role in contract management, customer administration, and service operations — learning how a multinational runs its day-to-day administrative processes.

What you will learn and do

Contract management

• Help create and maintain rental contracts for equipment and machines.
• Support the management of contract documentation and annual contract records.
• Assist in preparing and sending completed contracts, monthly fees, and summarized addendums.
• Support the opening and closing of rental services and contracts.

Customer & data administration

• Update equipment and customer information within SAP and internal systems.
• Help create and maintain customer accounts, including Sold-to and Ship-to records.
• Provide administrative support to customers and internal stakeholders.

Service operations support

• Support the creation and management of Preventive Maintenance (PM) plans.
• Help open and manage service requests and administrative cases.
• Support operational, service, and commercial teams with day-to-day administrative activities.

What we are looking for

Profile

• Student currently enrolled in an educational institution, able to sign a curricular internship agreement (estágio curricular) — this is essential.
• Studies in Administration, Management, Business, or a related field (preferred).
• Interest in building a career in administration, customer support, or operations.

Skills & competencies

• Problem-solving mindset with a positive and solution-oriented attitude.
• Strong communication skills, with the ability to clearly express ideas and actively listen.
• Team player who enjoys collaborating and supporting colleagues.
• Empathy and a customer-focused approach.
• Flexibility and adaptability to changing priorities.
• Proactive attitude and willingness to learn.
• Strong organizational skills and attention to detail.

Knowledge

• Good knowledge of Microsoft Office applications.
• Any exposure to ERP systems is a plus (no prior experience required).

Nice to have

• Familiarity with SAP.
• Interest in industrial, manufacturing, or service-related environments.

Languages

• Fluent English (written and spoken).

What we offer

• A structured internship in a stable, established multinational — a market leader, not a startup.
• Real, hands-on tasks and mentorship from an experienced international team, not just observation.
• Exposure to core business tools (SAP, internal systems) and to how a global organization manages contracts, customers, and service operations.
• A strong first line on your CV and a real professional network in an international company.
• Full-time schedule, Monday to Friday, 9:00 AM to 6:00 PM.
• Duration: 6 months. Start date: September.

Internship details

Location: Zona Industrial Alto do Colaride, Rua C, Armazém B, 2735-207 Agualva-Cacém, Portugal
Type: Curricular internship (estágio curricular), full-time, 6 months
Category: Administration / Customer Support
Industry: Industrial Machinery
Important: it is essential to be able to sign a collaboration agreement (protocolo de estágio) with your educational institution.

The hiring process is conducted from Spain, so the calls come from a number with the prefix +34

Job Type: Internship
Contract length: 6 months

Pay: From 1.00€ per month

Application Question(s):

• Are you currently enrolled in an educational institution and able to sign a curricular internship agreement?

Work Location: In person