WSI International
WSI International
Wastewater Treatment and Equipment
Engineering Team

Our Team

WSI International is a group of engineers committed to coming up with reliable and efficient Wastewater Treatment Systems designed to meet your industry’s wastewater treatment demands.

A provider of innovative systems, we have been designing industrial and municipal wastewater treatment plants and wastewater equipment for over 30 years. Years of experience and commitment to excellence has seen us become a go-to provider of the most reliable treatment plants around the world.

All wastewater treatment plants are made from the highest quality components, ensuring longevity and reliability.

Currently supporting over 80 plants around the world, our staff is fully equipped with the needed expertise to tackle any wastewater project across different industries. 

Whether it’s a wastewater system in Oil & Gas, Food & Beverage, Industrial Pre-Treatment, or Municipal industries, we have the right team to deliver optimal results.

Our Leadership 

Poe Tyler

Poe Tyler


Poe has over 18 years of experience in the wastewater field including design, construction, start-up and operations of water, wastewater, renewable energy and bio-solids treatment facilities.

He graduated from Cornell University, Ithaca, NY with a B.S. in Agricultural and Biological Engineering, and a Masters of Engineering in Biological and Environmental Engineering, also from Cornell. Poe began his career with Synagro in the Engineering and Facilities Development group on design build contracts working from the 60% design phase through start-up and ongoing operations.

He is a licensed Wastewater Treatment Operator in the state of Colorado. Poe has been with WSI for 12 years and continues to pursue excellence in design, manufacturing and execution of challenging wastewater treatment projects with the group at WSI.
Sean Fields

Sean Fields

Vice President of Sales

Sean is a dynamic, results-oriented Senior Design Engineer and is highly regarded for 10+ years of progressive experience in wastewater plant design, control logic, and industrial automation for industry leaders.

Sean offers a proven track record of assessing client needs and delivering fitting solutions to increase productivity and efficiency in competitive markets. Additionally, he is respected as a motivational, influential leader and collaborator who guides team members in achieving consistent on-time, under-budget project completion while exceeding client expectations. Sean builds and maintains lasting relationships with colleagues and clients driving company objectives through a people-focused approach. He is an out-of-the-box thinker and is committed to making continuous process and infrastructure improvement to enable growth.

Ben Garcia

Ben Garcia

Vice President of Engineering

Benjamin has over 18 years of experience in the equipment manufacturing field. His engineering philosophy is developing quality equipment that is operator friendly. He developed this philosophy by working on projects from concept development to operation. 

A graduate from the Fulton School of Engineering at Arizona State University with a B.S. in Mechanical Engineering. Benjamin began his career in manufacturing specialty commercial products. He gained valuable experience in reviewing customer specifications, developing equipment standards, and analyzing fabrication costs. His strong work ethic and leadership skills has taken him a long way at WSI where he began as a design engineer and is now VP of Engineering. 

In his spare time, he enjoys spending time with his young family by going biking, hiking, and enjoying the many outdoor activities that the beautiful Colorado Front Range has to offer. 

Randy Leander

Randy Leander

Senior Project Manager

Randy has been working in the Manufacturing and Wastewater Industries for over 35 years.  He worked for the City of Aurora, Colorado Utilities Department from 1980 to 1993, and then earned his BA in Industrial Design from Metropolitan State University of Denver in 1996.

Since then, Randy has worked for Engineering and Manufacturing companies in many capacities – Estimator, designer, project manager, purchasing agent, production supervisor, QA inspector, and even machinist.

He is currently Senior Project Manager here at WSI International where he has worked since 2012.  He lives in Highlands Ranch, Colorado with his wife of 33 years and 18 year old daughter.

Marita Leon


During her 20-year career, Marita Leon has earned a reputation as a dynamic and solutions-focused Financial Professional with expertise in effectively managing the day to day accounting operations, while also identifying redundancies and streamlining processes to maximize operational success for leaders in the engineering industry. She is also respected as a motivational, hands-on leader who builds high-performing teams, developing their talent and guiding them to consistently achieve critical performance goals. 

Marita joined the team at WSI International, LLC in 2007 and has spent her tenure generating comprehensive financial statements, and reports to support million-dollar project budgets. She has also successfully prepared and filed monthly sales taxes for the company’s multiple locations across the Unites States. Leveraging her Spanish speaking skills has also enabled Marita to manage the daily activities and bank transactions of accountants in both Costa Rica and Nicaragua, as well as accurately translate all purchase agreements.

Marita has also worked for Creative Surface Interiors, Inc, where she applied her industry expertise to processing payroll, maintaining personnel records, onboarding new hires, and completing AP/AR processes within time-sensitive deadlines. Prior to this, Marita was part of the team at Wholesale Florist & Florist Supplier Association, as well as The George Washington University.

Marita holds commendable qualifications including a bachelor’s degree in Business Administration from Inca Garcilaso de la Vega University, courses in Administration and Organization from ESAN, Accounting and Project Management from AACC as well as English as a Foreign Language from The George Washington University.