Mosaic Internship 2027–2028: Programs, Deadlines & How to Apply

Last updated: September 2026

The Mosaic Company (NYSE: MOS) is the largest U.S. producer of potash and phosphate fertilizers, generating $12.05 billion in revenue (2025) with approximately 13,000 employees across six countries. Formed in 2004 through the merger of IMC Global (founded 1909) and Cargill's crop nutrition division, Mosaic serves farmers in over 40 countries from its headquarters in Lithia, Florida. The company runs a structured co-op and internship program with ~15-week paid terms, furnished housing and relocation assistance, and a direct pipeline into the New Grad Program. LinkedIn lists 33 open Mosaic intern positions for Spring and Summer 2027 across engineering, technology, finance, and supply chain. Mosaic's Esterhazy K3 mine in Saskatchewan is expected to become the world's largest underground potash mine. Glassdoor rates the company 4.1/5 with 84% recommending and 79% CEO approval.

Quick Facts

Summer 2027 co-op/intern postings are ALREADY OPEN on Mosaic's Workday portal. Rolling admissions with an October 18 cohort deadline noted. GPA minimum is 2.75, notably lower than peers. Furnished housing and relocation assistance included.

Externships are short, remote professional experience programs where you finish a real project with a real company. The Hydroficient IoT Cyber Defense Externship and the EIC Energy Transition Venture Capital Market Research Externship build the industrial technology and sustainability skills Mosaic's engineering tracks demand. Explore all Externships.

What Is a Mosaic Internship?

A Mosaic internship is a paid ~15-week co-op or intern placement at one of the world's leading fertilizer producers, offering hands-on experience in chemical engineering, mining operations, capital project management, IT/AI, and finance. The co-op program provides furnished housing and relocation assistance, a 9/80 compressed work schedule (every other Friday off), and a direct pipeline into Mosaic's New Grad Program. Interns work at real plant-floor and mine-site operations across central Florida, contributing to plant optimization, data monitoring, statistical analysis, and process engineering. Glassdoor rates Mosaic 4.1/5 with 84% of employees recommending the company. The GPA minimum of 2.75 is lower than many chemical industry peers, reflecting the company's emphasis on practical, hands-on aptitude alongside academic performance.

When Do Mosaic Internship Applications Open for 2027–2028?

Mosaic's co-op and intern program posts positions approximately 9 to 10 months ahead, and Summer 2027 postings are already live on the Workday portal. The Summer 2027 term runs May 10 to August 20, 2027. Applications are reviewed on a rolling basis, with an October 18 deadline noted for some cohorts. Mosaic recruits primarily through online applications (Glassdoor reports 100% of intern candidates applied online). Central Florida locations are semi-rural and not accessible by public transit, so a valid driver's license and reliable transportation are required for all roles.

How to read this page: our dates come from tracking previous recruiting cycles and daily posting data. Treat them as informed estimates based on historical patterns, not confirmed dates. The company's official careers page is always the most current source. If a role is posted there, go by that, even if this page suggests the window hasn't opened yet.

Why You Must Apply the Week Applications Open

Mosaic's Summer 2027 postings are already live, and rolling admissions mean the best positions fill first. The company posts 9 to 10 months ahead, and LinkedIn shows 33 open intern positions as of September 2026. The 2.75 GPA minimum is lower than most chemical industry peers, which broadens the applicant pool and increases competition for desirable roles. The furnished housing and relocation assistance benefit is genuinely valuable for students relocating to central Florida for the summer. Students who apply in September have the widest selection of tracks and locations across Mosaic's 17 role families.

Which Mosaic Internship Programs Should You Target?

Mosaic offers co-op and internship positions across 17 role families in engineering, technology, and corporate functions:

Additional role families include Mechanical Engineering, Environmental/Health/Safety, Geology, Maintenance, Supply Chain, and more. See the full slate at mosaicco.com/Co-Op-and-Internships.

What Are the Eligibility Requirements?

Mosaic co-op/intern eligibility from confirmed Workday JDs:

• Enrollment: full-time student pursuing a bachelor's degree at an accredited institution.

• GPA: 2.75 or higher. This is notably lower than many chemical industry peers (Dow and DuPont list 3.0), reflecting Mosaic's emphasis on hands-on aptitude.

• Class year: sophomore or above for Operations/Process Engineering. Junior or above for Mining Engineering. Other tracks vary.

• Physical requirements: must be able to wear a respirator, climb stairs, work at heights, lift up to 25 lbs, and tolerate industrial chemical and mining environments. Post-offer drug screening, background check, physical exam, and functional capacity exam required.

Are These Plant-Floor Roles or Office Jobs?

Primarily plant-floor and mine-site. Mosaic's engineering co-ops work in industrial chemical processing plants and phosphate mines across central Florida. These are not desk-only roles: JDs emphasize the ability to function in an industrial environment, wear PPE including respirators, and handle physical demands. IT, Finance, and Capital Projects roles at the Tampa corporate office are more office-based, but field exposure is still common. If you are comfortable in an industrial environment and want hands-on engineering experience, this is the program.

What Skills Does Mosaic Look For, and How Do You Build Them?

Mosaic sits at the intersection of mining, chemical processing, and agricultural science, and its intern hiring reflects that industrial identity. Across the 17 role families, the pattern is clear: plant optimization and troubleshooting appear in every engineering track, cross-functional communication bridges plant operators and management, and industrial safety awareness is a baseline requirement. What does this tell you? Mosaic hires engineers who can solve real operational problems in real industrial environments, not just model them in software.

How Is Demand for Chemical & Mining Engineering Interns Moving Right Now?

Build These Skills Before You Apply

And every skill in the chart maps to a remote Externship where you finish a real company project before the window opens.

How close is the overlap? The Hydroficient project builds IoT and cybersecurity skills directly relevant to Mosaic's digital transformation in mining, the EIC work matches the sustainability and ESG context, and the CIJY project trains data visualization for operational analytics.

What Is the Mosaic Application and Interview Process Like?

Mosaic's application process is online-first, with Glassdoor reporting 100% of intern candidates applied through the website:

1. Apply online at mosaicco.com/Co-Op-and-Internships through the Workday portal. Multiple Summer 2027 postings are already live. Select your target engineering discipline and location.

2. Phone screening interview. Initial conversation with a recruiter covering motivation, major, and interest in the fertilizer/mining industry. Expect questions about your comfort level in industrial environments.

3. Technical interview with hiring manager. Discussion of engineering coursework, relevant experience, and problem-solving ability. Reference specific Mosaic operations: the phosphate wet process, potash solution mining, or Esterhazy K3.

4. Post-offer requirements. Drug/alcohol screening, background check, physical exam, and functional capacity exam. Verify your driver's license and reliable transportation access for semi-rural Florida plant sites.

5. Housing and relocation setup. Mosaic provides furnished housing and relocation assistance. Onboarding details and 9/80 schedule confirmation follow.

Demonstrate mission alignment: Mosaic's JDs open with 'We Help the World Grow the Food it Needs.' Interviewers are genuinely interested in whether you connect your engineering work to agriculture and sustainability. Our HireVue question guide with a free AI mock tool covers behavioral interview preparation.

What the Community Says

Mosaic generates discussion in chemical engineering and Tampa-area subreddits, with threads covering the co-op program, interview experiences, and central Florida operations.

How Do You Stand Out at a Company That Feeds the World?

Three moves, all executable before applying. First, understand the core processes. Mosaic's phosphate operations use the wet-acid process (reacting phosphate rock with sulfuric acid to produce phosphoric acid), while potash operations at Belle Plaine use solution mining. Demonstrating knowledge of these in your interview signals genuine interest beyond generic chemical engineering. Second, connect your work to the mission. Every Mosaic JD opens with 'We Help the World Grow the Food it Needs.' Interviewers are described as genuinely interested in your experiences rather than just technical knowledge. Prepare stories that connect your engineering work to agriculture, sustainability, or feeding a growing global population. Third, mention Esterhazy K3. Mosaic's new potash mine in Saskatchewan is expected to become the world's largest, most competitive underground potash mine. It represents a multi-billion-dollar investment and is a talking point that shows you follow industry developments.

What Other Companies Should You Consider?

Mosaic competes for chemical and mining engineering intern talent with other fertilizer, chemical, and industrial companies:

Our engineering internships summer 2027 guide maps the full landscape of chemical, mining, and industrial engineering opportunities.

FAQ

When should I apply for a Mosaic Summer 2027 co-op or internship?

Apply now. Summer 2027 co-op and intern postings are already live on Mosaic's Workday portal with a term running May 10 to August 20, 2027. Applications are reviewed on a rolling basis with an October 18 deadline noted for some cohorts. Apply as early as possible for the widest selection of tracks and locations.

How much do Mosaic interns earn?

Mosaic does not publicly disclose intern pay rates. The program provides furnished housing and relocation assistance, a 9/80 compressed work schedule with every other Friday off, and meaningful hands-on engineering experience. Chemical industry peer benchmarks suggest competitive hourly rates for co-op positions in central Florida.

Does Mosaic provide housing for interns?

Yes. The co-op program provides furnished housing and relocation assistance for students who need to relocate to central Florida plant sites. This is a significant benefit given that the semi-rural locations in Bartow, Mulberry, Bradley, and South Fort Meade are not near major university campuses.

What GPA does Mosaic require for co-ops and internships?

Mosaic requires a minimum 2.75 cumulative GPA across all confirmed Workday postings. This is notably lower than many chemical industry peers like Dow and DuPont, which list 3.0. The lower threshold reflects Mosaic's emphasis on practical hands-on aptitude alongside academic performance.

What majors does Mosaic recruit for co-ops?

Chemical Engineering for operations and process roles. Mining Engineering for mining tracks. Electrical Engineering for power and control systems. Computer Science, AI/ML, and Data Science for IT and digital transformation. Accounting and Finance for corporate tracks. Each track specifies its required major in the Workday posting.

Can international students apply to Mosaic?

All postings state candidates must be legally authorized to work in the United States. No explicit visa sponsorship commitment was found, and Mosaic participates in E-Verify. International students with existing CPT or OPT authorization may be eligible, but no sponsorship for new visas is documented.

Do I need a car for a Mosaic internship?

Yes. All Workday postings require a valid driver's license and reliable transportation. Mosaic's plant sites in Bartow, Mulberry, Bradley, and South Fort Meade are in semi-rural central Florida, not accessible by public transit. The Tampa corporate office is more accessible but still requires transportation.

Does Mosaic convert interns to full-time?

Yes. The co-op program feeds directly into Mosaic's New Grad Program. LinkedIn shows 33 open intern positions alongside robust full-time hiring, indicating a strong pipeline. The program's 15-week duration and hands-on project work are designed to evaluate candidates for long-term fit in the organization.

Mosaic's co-op program puts you inside the world's largest phosphate and potash producer, building the food supply chain from the ground up. Spend the runway building proof: a remote Externship turns interest in chemical engineering or industrial technology into a finished project you can reference in your application today.