HMH – Staff


Erik Haas, Dipl. Ing.,  







Principal/Owner                                                                                            Anchorage/Tucson

(907) 562-8100 or (907) 230-0941

        Erik has more than 30 years of industry and government experience. He previously managed the air quality section for Alyeska Pipeline Service Company and was a founding member of the Alyeska, BP and ARCO Air Quality Peer Group. He was a member on the American Petroleum Institute (API) sub-committee on Air Quality Regulations. He managed the industrial/domestic wastewater program and coordinated the air quality permits and compliance program for the State of Alaska. He worked as an air quality district engineer for the State of Wyoming and as a process engineer for Michelin Tire Co. in France and Germany. He participated in the Exon Valdez oilspill remediation operations.

        Erik holds a degree in chemical/process engineering from the University of Stuttgart, Germany with majors in power plant design and environmental engineering and completed his master thesis at Oregon State University. He was an adjunct instructor for graduate air quality classes at the University of Alaska.


    Tom Chapple                                                                                                                                                                                                                               Tom Chapple, Senior Advisor

Principal Consultant

Juneau, AK

(907) 440-4776

Tom served in various engineering, technical and management roles during his 25+ years at Alaska DEC culminating in nine years as the Director of the Air Quality Division. He led ADEC’s Pipeline Corridor Regional Office for the North Slope, TAPS and Valdez oil operations and then managed the statewide oil spill prevention and response program. During his tenure at ADEC he was responsible for leading numerous changes in air quality regulations including major changes in state statutory laws.

After leaving ADEC in 2008, Tom worked for Chevron’s Cook Inlet operations as the lead for implementing their internal environmental management system. Since joining HMH in 2012 Tom’s specialty focus is serving client needs for assessing compliance status or resolving agency non-compliance allegations. He is skilled at performing audits or developing compliance tracking tools such as environmental management systems.  His regulatory and statute law background is unique and valuable to HMH clients where an in-depth knowledge of state policies and regulatory interpretation can help companies fine tune operational practices to permit or regulatory requirements.  He has also assisted clients in seeking permit or regulatory changes that enable companies to improve their operational flexibility while meeting the state’s environmental objectives.

Tom holds a M.S. degree in Environmental Engineering from the University of Southern California and received a B.A. degree in Chemistry from Southern Illinois University.

Donna Celia                                                                                                                                                                                                                        Donna MS Celia, Environmental Scientist/Project Manager

Air Quality Scientist/Project Manager

 Anchorage, AK

  (808) 255-1661

           Joining HMH in 2009 Donna manages a variety of permitting and compliance projects as an Air Quality Staff Scientist. Donna:

  • works dynamically with customers to develop and implement compliance management systems, including integration of rapidly changing Federal and State regulations; and 
  • provides clients with a range of skilled assistance, including regular permitting and compliance duties, on site regulatory guidance and training, and pre-project environmental impact analysis.

       She organizes the preparation of major and minor Title I and V permit applications and renewals, as well as annual compliance certifications, semi-annual facility reporting and compliance schedules/calendars. Donna is HMH’s expert on spill prevention, control and countermeasure plans (SPCCs). She has worked in soil and groundwater remediation and has experience with Phase I and II environmental site assessments. Her resume includes several years as an archaeologist in Oregon, Hawaii and Alaska. Donna worked as a survey archaeologist on the Denali Gas Line Project.

       Donna has a Bachelor of Arts degree in Anthropology/Geography from the University of Oregon (2005) and was awarded the International Society of Collegiate Scholars award.

 Lisa JM Roberts


Environmental Scientist

Anchorage, Alaska 99516

C: 907-322-5947




       Lisa has nearly 10 years of experience as a special projects field supervisor and production chemist in the oil and gas industry.  She coordinated sampling programs for BP’s Heavy Oil reservoir programs to pioneer the first detailed analytical data collection of heavy oil production and operations in Prudhoe Bay, AK.  She analyzed and drafted reports thru Laboratory Information Management Systems (LIMS) for all test and conferred with scientists and engineers on result interpretations and to assure that procedures were properly implemented in the field. She assisted with health safety and environmental (HS&E) programs, performed risk assessments, monitored production waste and air quality.  She designed a Mobile Laboratory for field sampling in hazardous and safety sensitive areas.  Under EPA’s CERCLA Superfund program with the Nuclear Regulatory Commission, Lisa performed sample analysis of radioactively contaminated sites throughout the United States for three years. Lisa was chairman of the Fairbanks Historical Preservation Society from 2003 to 2006.

Lisa has Bachelor of Science degrees in Chemistry  and Biology from University of New Mexico, Albuquerque, NM.  She also has an AK Environmental Technician Certificate, Alaska Forum, Anchorage, AK, 2016.

Joy A. Jaeger


Air Quality Engineer

 Anchorage, AK

 (512) 876-1052



Joy supports the permitting/compliance section with the preparation of major and minor Title I and V permit applications and renewals, as well as annual compliance certifications, semi-annual facility reporting and compliance schedules/calendars and other monitoring, recordkeeping and reporting activities.  Joy also manages all water quality compliance activities  for several on-and offshore seafood processing facilities.

Her past work experience includes monitoring of operating and testing operations  as well as logging of oil production levels of oilfield operations in Texas. She tutored in mathematics and engineering at the university level.

Joy earned a Bachelor of Science degree in Mechanical Engineering from University of Alaska, Anchorage and a Bachelor of Arts in Mathematics from Texas Tech University (Summa Cum Laude).  


 Andreah Mathews


Air Quality Engineer

 Anchorage, AK




Andreah recently joined HMH to support the permitting/compliance section with the preparation of major and minor Title I and V permit applications and renewals, as well as annual compliance certifications, semi-annual facility reporting and compliance schedules/calendars and other monitoring, recordkeeping and reporting activities. 

Her past work experience includes 3 years as a process engineer for Bergman/Colliers Engineering and Design LLC and 3 years as a maintenance engineer for Dow Chemicals Inc. 

Andreah holds a Bachelor of Science Degree in Mechanical Engineering from Brigham Young University and a Master of Business Administration from University of Houston Clear-lake.

 Andreah serves as member of the board for the American Indian Relief (AIR) from October 2015 to present

Sean D. Lowther (Associate)


Senior Air Quality Engineer

 Anchorage, AK

 (907) 854-8213SeS


Prior to joining HMH consulting, Sean was at Hilcorp Alaska from 2012 to 2017 doing Air Quality Permitting and Compliance and as the Rotating Equipment/Compression Engineer. His air quality work included reviews of new applicable federal requirements and the technical feasibility of their implementation for Hilcorp’s various facilities and permitting of new or modified equipments. He developed Title I and V air quality permit applications, prepared facility operating reports, annual compliance certifications and escorted and worked with ADEC during facility compliance evaluations. He initiated the Greenhouse Gases (GHG) reporting program for Hilcorp, completed and submitted the First GHG reporting under EPA’s reporting rules for Hilcorp Alaska, LLC.                                                                                    

       From 2006 to 2011 Sean was an Environmental Engineering Associate with the State of Alaska, Air Quality Division in Anchorage, AK. He performed New Source Review, Prevention of Significant Deterioration, and Minor Source Specific Permit reviews. His focus was oil and gas and mining and performed compliance evaluations of these stationary sources throughout the state and spent a significant amount of time on the Kenai, in the Cook Inlet, and on the North Slope. He earned the recognition of a technical expert for the Division of Air Quality, and as a turbine expert, and assisted the multi faceted climate change sub-cabinet as the turbine expert for development of the climate change plan for the State of Alaska.                                                

       From 1992 to 2008 Sean worked for United Technologies/Pratt & Whitney, in East Hartford CT.  He had several roles over those years, notably as one of the key designer of low emissions combustors for turbines as part of a NASA funded emissions reduction program. Additionally he was involved in various other areas of turbine design, field engineering, and maintenance practices.                                                                          

       Sean earned a Bachelor of Science degree in Mechanical Engineering from University of Hartford, West Hartford, CT.

Larry Taylor, Jr., QEP   (Associate)                                                                                                                                                                             

Senior Advisor, Ambient Monitoring Section

Senior Advisor, Ambient Monitoring  (Sub-Contractor)     

Anchorage/Big Lake, AK 907-538-7707

             Joining HMH in 2002, Larry currently serves as a Senior Advisor for selected monitoring projects. Larry previously coordinated the air quality permitting and monitoring efforts with the Municipality of Anchorage. He was an analytical chemist, process engineer, and then plant foreman at Alaska Pulp Corporation in Sitka for sixteen years. He also owned a chemical laboratory for asbestos microscopy, bacteriology for seafood processors, indoor air quality chemical analyses and urinalyses.

            Larry is a member of the American Chemical Society and past Counselor of the Alaska Section. He has BS degrees in Chemistry and Biology from University of Alaska, Fairbanks, and a BA in Sociology from Haverford College, Pennsylvania. He is a QEP (Qualified Environmental Professional of IPEP) since 1996.                                                                                                                                    

Karen Haas                                                                                                                                                                                                                       Karen3-1

Business Administrator(907) 230-0941         

Anchorage. AK/Tucson, AZ 



Karen is HMH’s business administrator and oversees all aspects of business development including staff training, marketing, advertising, state and federal contracting, payroll, cost/tax accounting and financial planning. She oversees all quality assurance aspects with technical report preparation and documentation, standard operating procedures, business control documentation and manuals. Ms. Haas has a Bachelor of Arts in German from the University of Oregon and previously managed a small business in Alaska.