About Us

Nuclea Energy is a Canadian advanced nuclear technology company developing next-generation microreactors designed to deliver reliable, carbon-free energy to remote communities, critical infrastructure, Arctic operations, and data centers.

We are a fast-growing company operating at the intersection of advanced technology, clean energy, and global infrastructure. We are building not only innovative energy solutions but also the team, processes, and foundation that will support our growth. This means working in an environment where ideas move quickly, priorities evolve, and individuals have the opportunity to make a meaningful impact.

We are looking for talented and adaptable people who are excited by the opportunity to help build something from the ground up and contribute to the future of energy.

The Role

This is not a traditional back-office Executive Assistant role. As Executive Assistant, you will work closely with multiple members of the Executive Leadership Team in a fast-growing startup environment where priorities move quickly, decisions matter, and no two days look the same.

You will play a critical role in helping executives stay organized, prepared, and focused on their highest priorities. You will serve as a central point of coordination across multiple leaders.

As Nuclea Energy continues to grow, this role will help bring structure and organization to a dynamic environment. Your ability to anticipate needs, manage competing priorities, and adapt quickly to changing circumstances will directly contribute to the efficiency and effectiveness of the Executive Leadership Team and the organization as a whole.

Location: This position is based in our Mississauga, ON office.

What You’ll Do





- Own and maintain complex calendars for multiple members of the Executive Leadership Team, proactively coordinating schedules, resolving conflicts, and managing competing priorities across different time zones.
- Manage meeting logistics, including preparing agendas, sending invitations, booking meeting rooms or virtual links, and ensuring executives are informed and prepared.
- Monitor key deadlines, commitments, action items, and follow-ups across multiple executive portfolios to keep priorities visible and on track.
- Provide consistent and organized administrative support while maintaining clear processes, professional boundaries, and a high level of confidentiality.
- Coordinate domestic and international travel arrangements, including flights, accommodations, transportation, and travel itineraries.
- Use digital tools and systems to maintain organized records, streamline administrative processes, and support the Executive Leadership Team's efficient day-to-day operations.

What We’re Looking For

- Previous experience providing administrative or executive support, including supporting senior leaders, directors, or executives.
- Post-secondary diploma or degree in a relevant field (or an equivalent combination of education and experience).
- Strong organizational and time-management skills.
- High level of discretion, professionalism, and confidentiality.
- Strong attention to detail, autonomy, and proactivity.
- Proficiency with Microsoft Office,



Google Workspace, and other digital collaboration tools.

Salary Range: $60,000 – $70,000 per year

Why Join Nuclea Energy

- Work closely with the CEO and Executive Leadership Team
- Join a company building next-generation nuclear energy technology
- Gain exposure to investors, strategic partners, and industry leaders
- Chance to grow and drive positive change alongside a high-impact technology company
- Flexible hybrid work environment that supports collaboration and work-life balance

Additional Information

Applicants must be legally eligible to work in Canada. This position is based in Mississauga, Ontario, and requires three days per week in the office.

Nuclea Energy is committed to building a diverse and inclusive workplace. We welcome applications from people of all backgrounds, experiences, and perspectives. We do not discriminate on the basis of gender, race, religion, ethnicity, disability, sexual orientation, or any other ground protected by the Ontario Human Rights Code.

Accommodation is available upon request for candidates participating in any stage of the recruitment and selection process. If you require accommodation, please let us know, and we will work with you to support your needs throughout the recruitment process.

We thank all applicants for their interest in Nuclea; however, only those selected for an interview will be contacted.

Vacancy Disclosure

This posting is for an existing vacancy within the organization.

Artificial Intelligence Disclosure

Nuclea Energy Inc. may use artificial intelligence tools to assist with the screening and assessment of applications for this role. All hiring decisions are made by our Talent Acquisition team.

📌 Executive Assistant (Mississauga)
🏢 Nuclea Energy
📍 Mississauga