Senior Staff Environmental Engineer, Scientist, or Geologist

Langan Engineering & Environmental Services•Philadelphia, PA

About The Position

Langan is seeking a Senior Staff Environmental Engineer, Scientist, or Geologist to join its team in Philadelphia, Pennsylvania. The role supports environmental site investigation, remediation, and development projects. The successful candidate will conduct and support field investigations, collect samples and data, monitor construction, operate treatment systems, and prepare technical documentation. The position also includes leading or managing project tasks, coordinating staff as needed, and working with clients, subcontractors, and regulatory agencies. The work offers opportunities to help restore contaminated and blighted properties while protecting and enhancing the environment.

Requirements

Bachelor’s degree in Environmental Science, Environmental Engineering, Geology, or Hydrogeology.
At least 4 years of related experience in contaminated-site investigation, engineering feasibility studies, remedial and mitigation system design, and construction oversight.
For engineers, a valid professional license or the ability to obtain one within one year.
Experience conducting Phase I, II, and III environmental site assessments, including drilling observation, sampling, well installation, and construction or remediation oversight.
Experience with small- and large-scale groundwater treatment system design, operation, maintenance, and optimization.
Experience providing litigation support for expert witness projects or similar work.
In-depth knowledge 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 and excellent analytical, multitasking, and judgment capabilities.
Ability to work effectively independently and as part of a team.
Availability to work overtime as needed.
Willingness to travel as required by business needs and project assignments.

Responsibilities

Assist with planning and executing field investigations, including performing field tests, collecting samples and data, recording information, and completing routine calculations.
Monitor construction projects and conduct tests to evaluate contractor and subcontractor compliance 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 obtaining and complying with regulatory agency permits for site investigation and remediation.
Review and interpret environmental, geological, and historical records to support environmental due diligence.
Prepare standard logs and field forms, including drilling logs, field investigation daily reports, and chain-of-custody logs.
Identify and implement solutions to routine and complex field problems, document them accurately, and keep the project manager informed.
Lead tasks to prepare and modify engineering documents, including reports, specifications, plans, cost estimates, and designs.
Perform and manage tasks within budgets and schedules, and track task and project budgets as needed.
Work professionally with client and subcontractor representatives in collaboration with a supervisor.
Supervise or coordinate staff engineers, interns, and others supporting specific assignments as needed.
Perform other duties as requested.