Project Accounting Internship — Mentorship

Whether you're in the field, the shop, or the office, you'll be part of a team that values craftsmanship, collaboration, and continuous growth.

At Cox, we don’t just build HVAC systems — we build careers, relationships, and the future of our industry. Our team is driven by passion, led by people who empower others, and supported by an environment built to bring out the best in every individual.

From design through delivery, we work together — field, shop, office, and leadership — to solve problems before they happen, deliver smarter solutions, and push performance to new heights. It’s not just what we do. It’s how we do it that sets us apart.

View Open Positions

• Competitive pay and benefits
• A safe, respectful, and inclusive workplace
• Opportunities to work on high-impact, complex projects
• Real pathways for career development and advancement
• A strong culture of mentorship, learning, and continuous improvement
• A company that gives back to the community

Hear From Our Team

“Cox invests in people, not just projects. If you want to grow your career, this is the place to do it.”

Hear From Our Team

“You’re not just a number here. Cox gives you the tools, the trust, and the team to make an impact every day.”

Hear From Our Team

“What I love most is the respect — every role matters, and every voice is heard.”

Foreman

Hear From Our Team

“Cox invests in people, not just projects. If you want to grow your career, this is the place to do it.”

Recognized as one of Boston’s largest mechanical contractors and HVAC service providers, Cox has been named one of Boston’s Best Places to Work for four consecutive years. From a culture of collaboration and innovation to benefits like a fitness center, golf simulator, and career growth opportunities, Cox is where the best are built.