Citadel EHS

Providing EHS&S Consulting Services for the Life-Cycle of Real Estate and Business

Citadel EHS is a market-leading environmental, health, safety, and sustainability (EHS&S) consulting firm helping organizations create safer, more sustainable spaces.

Integrated delivery of services

One Brand, One Experience.

At Citadel EHS, we assess environmental health, safety, and sustainability challenges, resolve them swiftly, and strengthen the value and resiliency of our clients’ real estate portfolios and operations. 

Building Sciences & Hazardous Materials Management

Surveys, abatement oversight, and clearance for asbestos, lead, PCBs - safe renovations, demolitions, and re-occupancy.

Environmental Compliance & Permitting

SWPPP, air district rules, NPDES, SPCC, CUPA, audits, training - keeping projects permitted, compliant, and moving.

Engineering & Environmental Science Services

Phase I/II, soil-vapor/groundwater investigations, remediation design, and closure strategy from due diligence through completion.

ESG & Sustainability Consulting

ESG strategy and reporting, LEED/WELL consulting, GHG inventories, carbon roadmaps, and practical metrics for decision-making.

Moisture Intrusion & Microbial Consulting

Preventing mold and water damage to ensure building durability and occupant health.

Industrial Hygiene & Safety

Hazard assessments, exposure monitoring, IAQ, noise, Legionella, PPE, plus OSHA compliance, construction safety, confined space, and training.

Safety Consulting

Customized safety solutions that drive organizational success through risk reduction, culture building, program development, and compliance.

Air Quality Management

Providing emissions reporting, permitting, and consulting for regulatory compliance.

Who We Serve

We bring our expertise to various environments, delivering tailored environmental, health, and safety solutions where they’re needed most.

Built on Values. Driven by Results.

Choosing Citadel EHS means partnering with a team that stands out for its expertise, collaboration, and values-driven approach. At Citadel EHS, we don’t just deliver services—we build relationships and create solutions that make a difference.

Comprehensive Expertise

We are a one-stop shop, with subject matter experts leading each of our specialized practices. This ensures deep expertise across all areas of environmental, health, sustainability, and safety services.

Seamless Service Integration

Our practices work seamlessly together to provide a singular, consistent experience for stakeholders. This integration simplifies processes and ensures cohesive solutions.

Engaged Staff

Our employees drive our success. With exceptional retention rates and recognition as a "Best Places to Work," our team delivers results through dedication and expertise.

Values-Based Company

Guided by our 22 principles, we prioritize integrity, accountability, and collaboration in every project we undertake. These values shape how we serve our clients and build lasting partnerships.

Meet Our Clients

Since 1993, Citadel EHS has been providing technically sound, cost-effective solutions to complex environmental, health, safety, and sustainability challenges in various industries.

The Latest News from Citadel EHS

GLENDALE, Calif., Sept. 18, 2025 /PRNewswire/ — Citadel EHS (Citadel) is proud to announce the opening of a new office in Portland, Oregon, reinforcing its commitment to delivering premier industrial hygiene, safety, building science, environmental, and sustainability consulting across the Pacific Northwest. This expansion builds on Citadel’s recent growth, which already includes a flourishing office in Seattle, Washington, enhancing … Read more

We are excited to share that Laura Smolyar, a key member of our environmental services team at Citadel EHS, has earned the prestigious Council-certified Microbial Consultant (CMC) designation from the American Council for Accredited Certification (ACAC). The CMC credential is a board-awarded, peer-reviewed certification that recognizes both advanced knowledge and field experience in microbial sampling … Read more

We are pleased to announce that Citadel EHS has been prominently featured in the Environmental Business Journal’s (EBJ) Executive Review Edition (Volume 38 Numbers 1/2: Q1 2025). In this insightful edition, our CEO, Loren Witkin, participated in an extensive expert Q&A session, discussing significant developments and challenges within the environmental, health, and safety (EHS) sector. … Read more

Connect with Citadel EHS 

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