Meeting Environmental Health & Worker Safety Challenges


For over 20 years, Clark Seif Clark has provided a broad range of environmental compliance services to address complex environmental problems resulting from the use of toxic compounds and proliferation of biohazards.  Our mission has always been to protect the health and safety of people and the environment through the use of innovative and sustainable measures by applying the principles of value-engineering.

Our core competency is developing project work plans tailored to the individual needs of our clients.  We are truly a multidisciplinary team of professionals, guided by the same principles upon which the company was founded:

  • Direct and personal involvement of a Principal of the firm in every major contract
  • Clear and precise identification of client goals and needs
  • Timely, cost effective, and technically sound solutions
  • Client satisfaction

As a result of these business principles, CSC has earned a national reputation for:

  • Applying Cutting-Edge Strategies:  CSC’s approach is multi-disciplinary, utilizing capabilities of specialists in all relevant areas of strategic environmental management: resource restoration and conservation policy, physical and earth sciences, geology, land use, environmental economics, remedial action planning, design and implementation and legacy management of environmental liabilities. 
  • Providing Highly Qualified Professional Staff:  CSC delivers integrated, sustainable solutions for land management reuse planning and environmental project management.  Dedicated to making a difference, staff focuses on client needs, builds strong stakeholder relationships and produces project outcomes that are in compliance with the rapidly evolving, complex regulatory arena. 
  • Tailoring Services to Exceed Client Expectations:  CSC’s strength lies within its ability to integrate highly skilled teams of environmental scientists, technical specialists and project managers into a cohesive consultant team.  The consultant team focuses on developing innovative approaches that increase the sustainable value of real property assets.  This goal is achieved by balancing key project elements: scientific integrity, accountability (budget, schedule, quality) and best management practices for making and communicating project decisions.

One Team, One Purpose, One Goal – Value Engineering

In addition to meeting the experience-based criteria for designation as an Environmental Professional as defined in the federal All Appropriate Inquiry (“AAI”) regulations, members and associates of the firm possess education, experience, licenses or registrations and certifications in asbestos consulting, air monitoring, lead OSHA compliance, biology, chemistry, engineering geology, hydrogeology, chemical handling operations, waste management, environmental science and management, OSHA hazardous waste operations and emergency response (“Hazwoper”), environmental project management, industrial hygiene and hazardous materials rules and regulations. Staffing includes the following professional designations and classifications:

  • Certified Industrial Hygienist (CIH)
  • Certified Safety Professional (CSP)
  • Industrial Hygienist (IH)
  • Professional Geologist (PG)
  • Professional Engineer (PE)
  • Environmental Engineer (EE)
  • Certified Asbestos Consultant (CAC)
  • Certified Lead Project Designer
  • Certified Lead Inspector/Assessor/Monitor
  • Certified Site Surveillance Technician (CSST)

CSC relies heavily on apprentice-equivalent training for recent graduates and staff working towards a professional designation  to ensure that knowledge and experience is shared throughout the company.  At our Corporate Summit, field personnel receive their 8-hour Annual Hazwoper refresher training.  Our on-line learning center includes videos and guidance materials that provides  staff with easy access to technical information.


For over 20 years, Clark Seif Clark’s highly qualified Team has been providing a broad range of hazardous materials and health & safety compliance professional services to resolve complex environmental issues.  The cornerstone of our ability to meet client goals and objectives is our commitment to Value Engineering.  Our staff is highly motivated and successful at providing the most cost-effective approach when conducting environmental surveys; performing hazard assessments; preparing remediation and abatement work plans; and representing our client’s  best interests when providing field oversight of third-party contractors to ensure the quality of their work and conducting negotiations with regulatory authorities.

Contact us to learn how we can identify the best solution to your environmental concerns.


CSC has selected Deltek’s Ajera software as its integrated project management and accounting system to provide accurate and up-to-date data management, communication and easily accessible project tracking information.

CSC is certified to perform asbestos testing by PLM. This National Voluntary Laboratory Accreditation Program (NVLAP) provides third-party accreditation to testing and calibration laboratories in response to legislative actions or requests from government agencies or private-sector organizations. NVLAP-accredited laboratories are assessed against the management and technical requirements published in the International Standard, ISO/IEC 17025:2017. In addition several members of our professional staff have completed training for asbestos sampling and evaluation of airborne dust) and participate in annual third-party performance evaluations,i.e., NIOSH 582-Equivalent Certification).

ISNetworld (ISN, provides online safety management services designed to streamline a company’s safety compliance prequalification processes. Its purpose is to assist contractors and hiring clients to ensure that the firms they hire have health and safety plans that meet all appropriate regulatory requirements. CSC received an A rating for its Health and Safety Program from ISNET Clients.


Franco Seif, PE

President and CEO

Franco Seif is President and Chief Executive Officer of Clark Seif Clark, Inc. (CSC). He is also a co-founder of CSC.Franco been a leader in the environmental and engineering industry for over 3 decades. He started his environmental and engineering consulting career at Camp Dresser & McKee, Boston, MA, in 1985. In 1987 he worked as a consultant for EPI, Center, a small industrial hygiene company, Santa Monica, CA. In 1990, Mr. Seif started an environmental consulting firm, Californian Environmental Consultants, that provided asbestos, indoor air quality, and Phase I & phase II environmental site assessment services to a small group of clients. In 1996, Mr. Seif joined forces with Brian Clark and Robert Clark to form CSC.

Mr. Seif is also active in the community. He sits on the board of directors of St. Anne’s, a non-profit organization that provides care to abused young pregnant, mothers and their babies. Mr. Seif also sits on the advisory committee of the American Council of Accreditation and Certification (ACAC), a certifying body for the indoor air quality professional.

Mr. Seif hold a bachelor’s degree in civil engineering from Northeastern University, Boston, Ma, and a masters of science degree in engineering management from Drexler University, Philadelphia, PA. He hold a professional engineering registration in the State of California, and he is an asbestos consultant with the California Occupational, Safety and Health Administration.

Robert Clark




Robert Clark is the Vice President and General Manager of Clark Seif Clark, Inc. (CSC). He is also a co-founder of CSC. In 1985 Mr. Clark started his career with Watt Industries (Housing Developer) in the Southern California High Desert. In 1994 he started his career in the Environmental Business with brother Brian Clark company, Clark and Associates, performing Asbestos inspections related to the 1994 Northridge Earthquake. In 1996 he co-founded CSC and continues to work to provide superior environmental services for CSC clients.

Mr. Clark is licensed general contractor with the State of California. He is a California certified Asbestos Consultant, Lead Inspector/ Assessor, and Lead Project Designer.

Derrick A. Denis

Senior Vice President

Mr. Derrick A. Denis is a Senior Vice President and a valued Clark Seif Clark, Inc. (CSC) team member since 2000. Mr. Denis is a practitioner, inventor, educator, author and volunteer, who has provided professional industrial hygiene (IH), health and safety (EH&S), infection control (IC), and Indoor environmental quality (IEQ) services for over 29 years. Since earning a B.S. degree in Environmental Science from Phillips University in Oklahoma, Mr. Denis has directed many thousands of projects targeting common and emerging environmental hazards for a diverse clientele domestically and abroad. He has provided expertise on numerous legal cases for both Plaintiffs and Defendants.

Mr. Denis holds, or has held, numerous industry-relevant certifications, including, but not limited to, Council-Certified Indoor Environmental Consultant (CIEC), Certified Indoor Air Quality Professional (CIAQP), and Council-Certified Emergency Operations Professional (CEOP).
Mr. Denis is an inventor of, and patent holder for, Sewer Gas Solutions, a pourable product that inhibits evaporation of water in plumbing traps, thereby preventing sewer gas infiltration into buildings.
Mr. Denis is a sought after presenter, who has provided hundreds of educational sessions for associations and institutions around the world.

As a subject matter expert, Mr. Denis has appeared on television programs, been interviewed on radio talk shows, written and headlined educational videos, been quoted in major & local newspapers, authored many industry articles, and been published in peer-reviewed scientific literature.
Mr. Denis’ history of volunteerism has included positions on numerous Boards of Directors for IEQ Industry Organizations (e.g. Indoor Air Quality Association (IAQA), Environmental Information Association Arizona Chapter (EIA-AZ), American Council for Accredited Certifications (ACAC), etc.). He is the Chapter Director for the Phoenix IAQA Chapter.

Jeff Bannon, PG

Vice President of Environmental Services

Jeff joined CSC in June 2015 after serving nearly 28 years at a national engineering firm. Skills developed in his former capacity as Principal Project Manager and Office Manager provides ideal qualifications to lead our subsurface investigation/remediation group. He has directly managed several major projects and programs for a diverse customer base including the Federal government (US Navy, US Forest Service, Army Corps of Engineers), local governments (public works, port authorities, water districts) and private customers across the country. He has a proven track record in managing complex, multidisciplinary projects involving soil, soil vapor, groundwater, surface water, air and contaminated building materials on a wide-range of contaminants. He has served as project manager and/or technical manager on hundreds of assessments ranging from small, initial assessments (Phase Is) through multimillion dollar soil and groundwater investigations and cleanups. He is extremely competent at understanding the life-cycle of environmental projects, and the interrelation of technical objectives, regulatory requirements and cost implications in completing projects.

Jeff is Vice President of Environmental Services at CSC. He earned a B.A. in Geology from the University of Northern Colorado and M.S. in Geology from the University of Southern California, and is a California registered Professional Geologist (1992).

Performance Reviews

We strive to meet and exceed our client expectations at Clark Seif Clark

I just wanted to thank your staff here in town for helping ati out on all of these jobs over the holiday weekend.
Again and again, you guys never fail to come through in a pinch. Again thanks for doing what you do.


The work product you provided was excellent, and the first call I will make will be to you if opportunity arises.
The assignments I have been working on have had a hygienist involved when received. I do look forward to working with you again. Thank you.

Your contribution to the success of EIA 2008 was invaluable and the Environmental Information Association sincerely thanks you. Your presentation was a credit to the Association, and your participation strengthens EIA�s position as a primary information resource for our industry. Thank you again for your participation.


I applaud you for your hard work and dedication to bring this subject (mold) into the light for many of us who have had no earlier experience with mold.
I can tell you from my perspective, it is a challenge I’d much prefer to have good people behind me to correct.


Wanted to take the time to let you know how much information I received from your presentation.
That has been the most complete scope of the mold problem that I have heard. I am sure that your expertise is going to be much in demand in our industry.


Office Locations

Los Angeles

Mailing Address:
P.O. Box 4299
Chatsworth CA 91313

Physical Location: Map
21732 Devonshire Street, 2nd Floor
Chatsworth CA 91311

Contact Info:
Franco Seif – Email
Phone: (800) 807-1118
Fax: (818) 727-2556

Long Beach

Location: Map
4010 Watson Plaza Drive, Suite 170
Lakewood CA 90712

Contact Info:
Norman Kramer – Email
Phone: (562) 435-8080
Fax: (562) 590-8795


Location: Map
3373 Sierra Oaks Drive
Sacramento, CA 95864

Contact Info:
Robert Clark – Email
Phone: (800) 807-1118

Chandler, Arizona

Location: Map
7302 W. Chicago Street
Chandler AZ 85226

Contact Info:
Derrick Denis – Email
Phone: (480) 460-8334
Fax: (480) 460-8335

San Diego

Location: Map
11315 Rancho Bernardo Rd., Suite 150
San Diego CA 92128

Contact Info:
Norman Kramer – Regional Manager – Email
Phone: (858) 675-1088
Fax: (858) 675-1033

San Francisco Bay Area

Location: Map
275 Rose Avenue, Suite 206
Pleasanton CA 94566

Contact Info:
Robert Clark – Email
Phone: (925) 931-0100
Fax: (925) 931-0108