Environmental Engineer Sr - ASL

Company: Ahtna Solutions LLC
Location: Tucson
Posted on: February 16, 2026

Job Description:

Job Description Job Description Summary: The Senior Environmental Engineer will lead investigations and remediation projects at contaminated sites regulated under CERCLA in California/Nevada/Arizona/Oregon/Utah, ensuring technical quality, regulatory compliance, and effective communication with clients and stakeholders. The role includes developing and implementing remedial investigation, feasibility study, removal action, and remedial action work plans; overseeing field programs; and interpreting complex environmental data to support risk management and remedy selection. Key responsibilities include coordinating multi?disciplinary teams; preparing and reviewing CERCLA?compliant technical documents (RI/FS reports, decision documents, design packages, and construction completion reports); interfacing with federal and state regulatory agencies; and mentoring junior staff. The position requires deep knowledge of CERCLA, EPA requirements, and relevant California regulations and guidance (e.g., DTSC and Regional Water Boards), strong project management skills (scope, schedule, budget), and excellent written and verbal communication. The salary range for this position is $124,117-$155,766/year. This position may qualify as a telecommute position. The ideal candidate will reside in the Southwest region of the United States. This position comes with a competitive and comprehensive benefits package, including medical, dental, and vision insurance, life insurance, a 401(k) plan with a 3% match, paid time off (PTO), and company-paid holidays. This position will be posted for 5 days or until filled. Essential Duties and Responsibilities : (including but not limited to) Manage the completion of assigned tasks, including plan preparation, field staffing, subcontractor oversight, logistics, budget, invoicing, data acquisition, reporting, and close-out Develop and implement RI/FS, removal action, and remedial action work plans Develop conceptual site models, design monitoring networks, and prepare sampling and analysis plans Collect and interpret field data, review earth science data, synthesize and organize data as project objectives dictate, and manage or prepare the project deliverables Conduct statistical analyses of monitoring data sets, including non-parametric trend testing (e.g., Mann-Kendall), regression, and time-series analysis, and other appropriate techniques to evaluate temporal and spatial trends Support multiple projects, including consultation, plan or report preparation, and/or travel and fieldwork Travel in aircraft (jets, small planes, and helicopters), motor vehicles, ATVs, and/or watercraft to perform fieldwork, site visits, or meetings Prepare or assist with the preparation of plans, including project work plans, health and safety plans, field reports, and project reports Evaluate remedial and restoration alternatives Update job knowledge by reading historical documentation, publications, and other information related explicitly to applicable disciplines Enhance company and organization reputation by accepting ownership for the team performance and adding value to assigned tasks Provide scientific and technical guidance, support, coordination, and oversight to project staff preparing written project documentation Review and document the processes necessary to obtain environmental permits, licenses, and other requirements necessary to achieve environmental restoration project objectives Review and provide documentation of environmental technical standards, guidelines, policies, and formal regulations to ensure proposals meet all appropriate requirements Meet all safety responsibilities and goals Understanding best management practices as they relate to environmental investigations Implement process improvement and tracking and reporting on changes to scope and schedule Perform other duties as assigned by management Level Specific Responsibilities : (may include but are not limited to) Level - Senior Provide client assistance to program and project managers; scope, schedule, and budget on projects Maintain 2-3 areas of technical expertise Lead technical project execution and document preparation, senior review project documents Prepare task orders and project proposals Project staffing and technical mentoring Up to 25% of the time may be spent conducting fieldwork, potentially in remote locations Minimum Qualifications: All levels: Bachelor’s Degree in Engineering, with a preference for civil, environmental, chemical, or geotechnical US Citizenship Ability to pass background checks by various Federal Agencies (e.g., DOD, DHS, FAA, ) to obtain security access badges Valid Driver’s License with a clean driving record, able to drive a company vehicle Proficient computer skills using Microsoft Office Suite and databases such as Access and PowerPoint Adept at explaining technical aspects of fieldwork to internal and external clients verbally and in writing Level - Senior Eight (8) or more years of relevant working experience, specialized training, and/or an advanced degree such as MS may be substituted for work experience Professional Engineer Registration Preferred Qualifications: Proficiency in other programs such as Microsoft Project, AutoCAD, GIS, databases, and environmental modeling programs Current 40-Hour HAZWOPER CPR/1st Aid Certified Experience working on projects with Federal clients Experience working on projects valued at >$1M Experience working on biologically sensitive project locations Ability to obtain California QSP and/or QSD certification within first year of employment Project management experience Experience and knowledge of Alaska Native cultures Core Competencies: Self-motivated - Ability to be internally inspired to perform a task to the best of one’s ability using drive or initiative. Teamwork - Ability to integrate with diverse teams, including stakeholders, regulators, government officials, and internal staff. Communication - Ability to communicate effectively with others using the spoken word. Ability to communicate in writing clearly and concisely. Time Management - Ability to utilize the available time to organize and complete work within given deadlines. Goal Oriented - Ability to focus on a goal and obtain a pre-determined result. Accuracy - Ability to perform work accurately and thoroughly. Confidentiality - Ability to preserve confidential information. Shareholder Preference: Pursuant to PL 93-638, as amended, preference will be given to qualified Ahtna Native Corporation Shareholders, Descendants, and Spouses in all phases of employment. Working Environment: May be indoors or outdoors, subject to confined spaces, changes in temperature, weather conditions, and noise levels. Physical Demands (including but not limited to): Frequent lifting, sitting, standing, stooping for prolonged periods of time, using hands/fingers requiring dexterity, should have good hand-eye coordination and motion control in coordination with handling tools, equipment, and other related components. Reaching with hands and arms for items above and below sight level, talking, hearing, and seeing (up close, at a distance, along the periphery, with depth, color perception, and the ability to adjust focus); walking from place to place within the project location with occasional use of stairs and no elevator available; bending, pushing, pulling, and standing for up to 12 hours. Frequent lifting of up to 50 pounds, such as small electrical components, equipment, and other materials. Reasonable accommodations may be made to enable individuals with disabilities to perform the essential functions. Work Schedule: Monday – Friday, 8:00 to 5:00 or as business/operational needs dictate

Keywords: Ahtna Solutions LLC, Maricopa , Environmental Engineer Sr - ASL, Engineering , Tucson, Arizona