Proposal Development Specialist

We are seeking a highly organized and detail-oriented Proposal Development Specialist to join our Building Services team in our Vaughan office and be an integral part of delivering continued success within this department.

The Proposal Development Specialist is responsible for leading and supporting the full proposal and pursuit lifecycle while actively contributing to client strategy and business development initiatives.

Why This Role Matters to Modern Niagara

This position plays a key role in supporting client relationships and contributing to continuous improvement across all pursuits. This role goes beyond traditional proposal coordination by partnering with leadership, operations, and account teams to shape win strategies, support strategic planning discussions, prepare and participate in business reviews, and lead or support client debriefs.

Key Impact / Purpose

• Active participation and contribution in business reviews and client debriefs
• Demonstrated improvement in proposal quality, win rates, and internal processes
• Effective coordination across teams, with stakeholders reporting clear communication and alignment
• Contribution to lessons learned and knowledge-sharing initiatives that improve future pursuits

Duties and Responsibilities :

Must haves :

Nice to haves :

This is a new position. Expected annual compensation; $60,000 - $70,000

Modern Niagara offers a competitive total compensation package including :

Here at Modern Niagara, because we know our people are the best in the industry, we pride ourselves on providing a total compensation package that rewards employees for their hard work and supports employees and their families in their overall wellbeing.

About Modern Niagara

Who We Are

Modern Niagara helps building owners, managers, and general contractors meet the mechanical, electrical, integrated building technology, and building services needs of their buildings across Vancouver, Calgary, Edmonton, Toronto, Southwestern Ontario, and Ottawa.

We are committed to having a positive and meaningful impact on Canada’s infrastructure — and on the communities where we live, learn, work, and heal. We build for life.

Our Culture & Values

We value passion, initiative, determination, professionalism, and teamwork. Health and safety are embedded in everything we do, and our award-winning safety culture consistently performs well above industry standards.

Diversity, Equity & Inclusion at Modern Niagara

We are committed to building a diverse, equitable, and inclusive organization where everyone has access to opportunity, feels a sense of belonging, and can thrive. We actively work to remove barriers faced by members of equity-seeking groups (including women, Indigenous, Black, racialized, 2SLGBTQIA+ people, people with disabilities, and newcomers to Canada) in the construction industry. We encourage applications from candidates of all backgrounds and lived experiences and are committed to a barrier-free hiring process.

If you require accommodation at any stage of the recruitment process, please contact us at so we can make appropriate arrangements.

We appreciate every applicant’s interest in joining Modern Niagara. Only those selected for an interview will be contacted.