Senior Staff Engineer, Scientist, or Geologist
Confirmed on the employer's own hiring board on Nov 5, 2026. First seen by Alion on Sep 3, 2026. Langan scores A on the Alion truth index.
Langan provides expert land development engineering and environmental consulting services for major developers, renewable energy producers, energy companies, corporations, healthcare systems, colleges/universities, and large infrastructure programs throughout the U.S. and around the world. Our employees collaborate seamlessly among 50+ offices and gain valuable hands-on experience that fosters career growth. Langan culture is entrepreneurial from advancing innovative technical solutions, to participating in robust training and knowledge sharing, to making progressive change within the communities we live and work.
Consistently ranked among the top ten “Best Firms to Work For” and Engineering News-Record’s top 50 firms worldwide, Langan attracts and retains the best talent in the industry. Employees thrive at Langan, a firm that fosters an inclusive and supportive work environment for all; prioritizes wellbeing, health, and safety; encourages volunteerism and philanthropy; offers workplace flexibility, along with carbon-neutral office spaces; and empowers individuals to contribute their skills and knowledge to make impactful contributions.
Job Summary
Langan is seeking a Senior Staff Environmental Engineer, Scientist or Geologist to join its collaborative team in Irvine, CA. This individual will serve a key function in providing site exploration activities, including soil borings and monitoring well installations; conducting field tests; collecting field data and samples; monitoring construction sites; and compiling data and preparing reports. In this role, you will have the opportunity to work on diverse projects, solve problems and overcome challenges in restoring the environment and returning blighted properties to productive re-use while protecting and enhancing the environment. The position encourages learning, growth, creativity, flexibility, and collaboration in a team environment
Job Responsibilities
- Assist with the planning and execution of field investigations by performing field tests, collecting samples, collecting and recording data, and performing routine calculations;
- Monitor complex construction projects by taking various tests to evaluate whether contractor or subcontractor has complied with job specifications;
- Collect soil, soil vapor, indoor and ambient air, sediment, surface water, and groundwater samples;
- Operate and maintain groundwater and soil vapor treatment systems;
- Assist with acquisition of and compliance with regulatory agency permits to support site investigation and remediation;
- Review and interpret environmental, geological, and historical records to support environmental due diligence;
- Prepare a variety of standard logs and field forms (such as drilling logs, field investigation dailies, and chain of custody logs);
- Identify and implement solutions to both routine and more complex field problems and document them accurately, keeping project manager informed or problems encountered during work assignments;
- Lead tasks associated with the preparation and modification of various engineering documents including reports, specifications, plans, cost estimates and designs for projects;
- Perform and manage tasks within specific budgets and schedules. May track task and project budgets;
- Interact in a professional manner with client and subcontractor representatives in close collaboration with supervisor;
- Supervise or coordinate the work of staff engineers, interns and others who assist in specific assignments as needed; and
- Perform other duties as requested.
Qualifications
- Bachelor’s degree in Environmental Science, Environmental Engineering, Geology or Hydrogeology;
- 4+ years of related experience in contaminated sites investigation, engineering feasibility studies, remedial and mitigation system design and construction oversight;
- For engineers, possession of a valid Professional licensure or ability to obtain within one year;
- Experience conducting Phase I, II and III environmental site assessment including drilling observation, sampling, well installation, construction/remediation oversight;
- Experience performing small and large scale groundwater treatment system design, operation and maintenance, and optimization;
- Experience providing litigation support services for expert witness projects, or similar;
- In-depth knowledge and understanding of state and federal environmental regulations (including CERCLA and RCRA);
- Experience working with state regulatory agencies;
- Excellent written and verbal communication skills;
- Strong attention to detail with excellent analytical, multitasking, and judgment capabilities;
- Ability to effectively work independently and in a team environment;
- Availability to work overtime as needed; and
- Possess reliable transportation for client meetings and job site visits and a valid driver’s license in good standing.
Langan provides a rich array of programs and benefits to help its employees advance their careers and enhance the quality of their lives. Our comprehensive compensation package includes: full-time employment company paid medical, dental, and vision coverage; life insurance, short- and long-term disability insurance, and paid pregnancy disability leave; 401(k)/Roth with company match; paid time off including parental and military leave; employee referral and professional license bonuses; and educational reimbursement.
Langan offers employee resource groups; flexible work schedules; extensive training; wellness programs; buddy and mentoring programs; and much more!
Langan is committed to providing equal employment opportunities to all qualified applicants and employees, including individuals with disabilities and protected veterans. We believe that an inclusive workplace is essential for the well-being and success of our employees.
Certain US jurisdictions require Langan to include an estimate of salary or hourly ranges. Actual compensation may vary based on factors such as related work experience, location, market conditions, education/training, certifications and other credentials, as well as applicable knowledge and skills. Certain roles may be eligible for overtime and participation in the firm's annual bonus and performance review program. Bonuses are discretionary and based on individual job performance and the profitability of the firm. Employees are also eligible to receive up to 20 days of paid vacation time, 10 days of paid sick time and 10 paid holidays throughout the year. Eligibility and actual paid time off may vary based on local law and factors such as hours worked, related work experience and level.
Pay Range
$76,000—$110,000 USD
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