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Mixmaster

MXMS Incident Position Description

The Mix Master provides oversight and support of the Wildland Fire Chemicals (WFC) mixing and loading operations. The MXMS reports to the Airtanker Base Manager (ATBM), Single Engine Airtanker Manager (SEMG), or Dip Site Manager. The MXMS works in the Air Operations functional area.

Leadership Level 2, New Leader (Convey Intent)

  • For additional information review Level 2 description, expected behaviors and knowledge, suggested development goals, and self-study opportunities.

Prepare and Mobilize

  • Ensure individual readiness.
  • Gather critical information pertinent to the assignment.
  • Travel to and check in at assignment.
  • Review Base Operations Plan and obtain initial briefing from supervisor.

Build the Team

  • Identify personnel assigned to the mixing crew and maintain accountability. Confirm that the Base Operations Plan or relevant plan has been reviewed with assigned resources.
  • Assemble assigned personnel.
  • Establish and communicate: chain of command; reporting procedures; risk management processes.
  • Establish a common operating picture with supervisors and subordinates.
  • Participate in operational briefings as directed and brief assigned personnel.
  • Obtain and distribute relevant directions, plans, and other information.

Supervise and Direct Work Assignments

  • Establish and communicate objectives, priorities, work assignments, and performance expectations.
  • Identify, analyze, and use relevant situational information to make more informed decisions and take appropriate actions.
  • Adjust actions based on changing information and evolving situation awareness. Develop and implement contingency plans. Communicate changing conditions to assigned resources and supervisor.
  • Ensure daily operational objectives and performance standards are met.
  • Monitor performance and provide immediate and regular feedback to assigned personnel.

Perform Mix Master-Specific Duties

  • Obtain daily or more frequent briefings from supervisor.
  • Provide leadership and direction to the mixing/loading crew during mixing/loading operations.
  • Ensure WFC products are mixed per the Qualified Products List (QPL) and tested prior to being loaded into aircraft.
  • Ensure aircraft are loaded per contract specifications.
  • Work with supervisor to maintain an adequate WFC products inventory based on current and expected activity.
  • Check all equipment such as valves, hoses, pumps, and tanks for operability and ensures agency and OSHA safety measures are in place (e.g., pump shaft guards, fan belt shields, splash guards, wiring integrity, sealed switch boxes, safety signs, and placards, etc.).
  • Request personnel and equipment necessary to perform operations safely and efficiently.
  • Plan the specific layout of the mix plant.
  • Ensure cleanliness of the mix plant.
  • Comply with the Lot Acceptance and Quality Assurance (LAQA) program for all WFC products.
  • Ensure only approved WFC products are utilized and mixed according to the QPL.
  • Utilize refractometer, Marsh Funnel, and mass flow meter to ensure contract compliance.
  • Develop a recirculation schedule.
  • Report and log pounds and gallons and validate as requested.
  • Provide for the safety and welfare of personnel working around the mix plant by using the risk management process.
  • Report all hazards and incidents/accidents immediately to supervisor.
  • Maintain records of all equipment, replacement parts, catalogs, technical manuals, and Safety Data Sheets (SDS).
  • Ensure OSHA regulations for mix plant safety are in place and properly documented in conjunction with supervisor.
  • Ensure compliance with state and federal EPA regulations for storage and handling of WFC products, hazardous waste, and wastewater in conjunction with supervisor.

Communicate and Coordinate

  • Follow established processes and chain of command for collecting, producing, and distributing information.
  • Report any hazardous conditions to supervisor and ensure appropriate action is taken.
  • Participate in After Action Reviews (AAR).

Manage Risk

  • Consider your skill level and limitations and work within them.
  • Apply the Risk Management Process as stated in the NWCG Incident Response Pocket Guide (IRPG), PMS 461.
  • Report all accidents or injuries to supervisor.
  • Ensure compliance with all safety practices and procedures for yourself and those around you.

Document

Demobilize

  • Follow demobilization instructions from supervisor.
  • Ensure incident and agency demobilization procedures and work/rest standards are followed.
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NWCG Latest Announcements

Incident Position Standards and the Next Generation Position Task Books Now Available for DMOB, DOCL, and RESL

Date: February 28, 2025
Contact: Incident Operations Subcommittee

NWCG is excited to announce that Incident Position Standards and the Next Generation Position Task Books are now available for Demobilization Unit Leader (DMOB), Documentation Unit Leader (DOCL), and Resources Unit Leader (RESL).

The Performance Support Packages for these positions, including a job aid for RESL, were developed as part of the Incident Performance and Training Modernization (IPTM) effort. These resources support trainees, qualified personnel, and evaluators in their respective roles.

Any changes to qualification pathways will take effect with the next update of the NWCG Standards for Wildland Fire Position Qualifications, PMS 310-1.

References:

NWCG Demobilization Unit Leader Position Page 

NWCG Documentation Unit Leader Position Page 

NWCG Resources Unit Leader Position Page 

Next Generation Position Task Book and Updated Incident Position Description Now Available for Operations Section Chief Complex

Date: February 27, 2025
Contact: Incident Operations Subcommittee

NWCG is excited to announce that Operations Section Chief Complex (OSCC) has a Next Generation NWCG Position Task Book for Operations Section Chief Complex (OSCC), PMS 311-108 and an updated Incident Position Description.

These resources support trainees, qualified personnel, and evaluators in their respective roles.

References:

NWCG Operations Section Chief Complex Position Page 

NWCG Operations Section Chief Complex Incident Position Description 

NWCG Position Task Book for Operations Section Chief Complex (OSCC), PMS 311-108 

2025 NWCG Incident Response Pocket Guide (IRPG), PMS 461, Now Available

Date: February 27, 2025
Contact: Incident Operations Subcommittee

NWCG is excited to announce that the 2025 NWCG Incident Response Pocket Guide (IRPG), PMS 461, is now available. Visit NWCG's website to learn about the major updates and changes in the 2025 version of the IRPG. The NWCG Guia de Respuesta de Incidente de Bolsillo (GRI), PMS 461-ES is available electronically and will be available from Great Basin Cache by early summer 2025.

All hard copy materials, including the IRPG, are ordered through the Great Basin Cache (GBK). Information on the ordering process can be found in the National Fire Equipment System (NFES) Catalog.

References:

2025 IRPG Information 

NWCG Incident Response Pocket Guide (IRPG), PMS 461 

NWCG Guia de Respuesta de Incidente de Bolsillo (GRI), PMS 461-ES 

NWCG NFES Catalog - Part 2: Publications, PMS 449-2 

2025 Professional Reading Program

Date: February 18, 2025
Contact: Wildland Fire Leadership Development Program (WFLDP)

The Wildland Fire Leadership Development Program is announcing the 2025 Professional Reading list! The goal of the annual reading list is to promote the reading and discussion of the books throughout the year.

The five books chosen for this year are: Surf When You Can by Brett Crozier, Man’s Search for Meaning by Viktor E. Frankl, Elephant Company by Vicki Constantine Croke, Simply Managing by Henry Mintzberg, and Chop Wood Carry Water by Joshua Metcalf.

References:

Professional Reading Program