
Are you looking for an opportunity to truly make a difference? Do you want to join a collaborative, mission-driven team that protects the planet, strengthens communities, and supports businesses when they need it most? Are you seeking a place where your work contributes directly to an organization known for excellence in environmental services, crisis management, and emergency response? If your answer is “yes,” then you belong at Ambipar.
A Senior Regulatory Specialist is responsible for supporting Witt O’Brien’s clients nationally with a varying degree of environmental and emergency management regulatory programs. Position requires traveling 40% - 50% of the time domestically, home on the weekends. A successful candidate will be able to write at a professional level and able to train client personnel in a classroom setting. Position requires juggling multiple projects at a time, so time management and project management capabilities are important to successfully navigate this role. Lastly, this position for the most part is self-directed, with support from management and support staff, so being able to work independently is an important aspect of this role.
Reports to: Manager, Compliance Services
Position Location: Remote
Position Type: On-Call
FLSA Status: Non-Exempt
Pay: Hourly
Compensation: Commensurate with experience
Travel: 40% - 50% Domestically, Rare Occasions Internationally
This position description incorporates the core responsibilities of the job. It recognizes that other related duties not specifically mentioned might also be performed, and that not all responsibilities may be carried out depending on operational needs.
Equal Opportunity Employer/Veteran/Disabled
With you when it counts.

Ambipar USA is a specialized partner for high-hazard, high-consequence operations, combining industrial services, emergency response, and environmental solutions into one integrated platform. Ambipar operates a network of service locations and response bases, positioned to support industrial facilities, transportation corridors, ports, terminals, and energy infrastructure with 24/7 coverage. Our teams are built around HAZMAT and complex incident management, with recognized expertise in chemical, petrochemical, and multi-commodity risk. From tank cleaning, integrity work, and plant maintenance to spill response, remediation, and waste management, we support the lifecycle of industrial assets with safe, compliant, and cost-effective execution.
Ambipar is a leading commercial hazmat response organization, with experience managing large-scale chemical releases, oil spills, fires, and multi-agency emergencies across all modes of transportation. Our teams specialize in containment, product transfer, neutralization, and decontamination, using advanced equipment and engineered systems to stabilize incidents and protect people, assets, and the environment. This capability is backed by 24/7 command center, technical support, and a broad response network.
Beyond immediate response, Ambipar delivers environmental solutions that cover remediation, hazardous waste packaging, transport and disposal, plus long-term recovery programs. We align practices with stringent regulatory requirements, helping clients reduce environmental liabilities while maintaining business continuity and protecting reputation. Our portfolio also includes industrial cleaning, confined space work, decommissioning, and specialized projects in complex, high-risk environments. For clients seeking a single partner to manage hazardous materials, complex operations, and environmental risk, Ambipar provides an integrated, incident-tested solution from preparedness through response and recovery.