Senior Environmental Professional | Assistant Project Manager

Trilon Group is seeking a Senior Environmental Professional | Assistant Project Manager in New Haven, CT. This full-time role involves supporting environmental projects, mentoring junior staff, and ensuring compliance with regulations. Candidates should have a relevant degree and 6+ years of experience. The position offers a hybrid work model, allowing for both in-office collaboration and remote work, emphasizing work-life balance and team connection.
Senior Environmental Professional | Assistant Project ManagerDepartment: Subsurface

Employment Type: Full Time

Location: New Haven, CT

Compensation: $100,000 - $120,000 / year


DescriptionCreativity. Innovation. A desire to effect positive change. That’s what it takes to work at Fuss & O’Neill – because that’s what we do for the communities in which we work: we create, innovate, and design long-lasting improvements that improve quality of life. Quality of life is also important on the job, so we’ve prioritized work-life balance by offering flexible/remote work opportunities, part-time benefits, and generous PTO. We believe that each day is an opportunity to support one another, to support our clients, and to support our communities. If you feel the same, then you’ve found your future.

As we continue to grow our environmental practice across Connecticut, we’re looking for a Senior Environmental Professional | Assistant Project Manager to join our talented Environmental team in Connecticut.

This is an exciting opportunity for an experienced environmental professional who is ready to take the next step into project leadership while continuing to build strong technical expertise. You’ll work alongside seasoned project managers, support complex environmental projects, mentor junior staff, and help deliver solutions for a wide range of public and private sector clients.
Key Responsibilities
Support project managers and provide technical leadership on a variety of environmental projects including:
Site investigations
Environmental remediation
Brownfield redevelopment
Environmental permitting and compliance


Assist with project coordination, scheduling, and oversight of field staff and subcontractors
Prepare high-quality technical reports, regulatory documentation, and client deliverables in accordance with Connecticut environmental regulations and company standards
Collaborate with clients, regulators, and internal teams to support successful project outcomes
Contribute to proposal development, client engagement, and broader business development efforts
Mentor and guide early-career technical staff while helping build team capabilities and project delivery efficiency
Support growing project workloads for a diverse client base including utility, industrial, commercial, and development clients

Skills, Knowledge and Expertise
Bachelor’s degree in civil engineering, Environmental Engineering, Environmental Science, Geoscience, or a related field
6+ years of environmental consulting or related experience
Strong understanding of Connecticut environmental regulations and remediation programs
Ability and desire to obtain Licensed Environmental Professional (LEP) certification within 2–3 years
Experience supporting or managing environmental investigation and remediation projects
Strong technical writing and communication skills
Desire to grow into project management, client management, and leadership responsibilities
Remediation design experience is a plus



This is a hybrid role, offering the best of both worlds—collaborate in-office with a high-performing team and enjoy the flexibility of working remotely part of the week. We're committed to supporting work-life balance while maintaining strong team connection and project delivery.
Why You’ll Love Working with Us

Schedule Flexibility: Customize your work schedule to fit your life.
Health & Wellness: Comprehensive health benefits to keep you and your family healthy.
Continuous Learning: Access to online courses, conferences, and learning materials to fuel your professional growth.

Paid Time Off: Take the time you need to recharge with our generous paid time off policy.
Career Advancement: Clear paths for promotions and the opportunity to take on new challenges.
Fun Team Culture: Regular team-building activities, happy hours, and company outings.


The base salary range for this role is indicated in the posting. This range reflects the company’s good faith estimate of the compensation for this position at the time of posting. Final compensation will be determined based on factors such as experience, skills, qualifications, internal equity, and geographic location.




Visa sponsorship is NOT available for this position

All offers are contingent upon a successful criminal background check. Fuss & O'Neill, Inc. is proud to be an Affirmative Action/Equal Opportunity Employer. Fuss & O’Neill participates in the Federal e-Verify program.

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