Houston Headquarters

Houston Headquarters

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The Core Four

These four team members were there when we opened our doors in 2005, and you can still find them here today!

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Servant Leadership

We embrace the communication style of servant leadership, and it guides our daily interactions.

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Community Commitment

We believe it is our responsibility to give back to the local community through our employee-led Humanitarian Committee.

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We take pride in training our team to provide excellent services to our clients!

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Jess A. McAngus, PE, QEP Jess A. McAngus, PE, QEP
In Memoriam
Brad N. Herrin Brad N. Herrin
CEO & Co-Founder
Air Quality | Chemicals | Refining
Direct: 281-664-2820
Tony Barlage Tony Barlage
Vice President
Rocky Mountain Region | Permitting & Compliance | Air Quality | Field Services
Direct: 720-500-3711
W. Scott Hyden W. Scott Hyden
Program Director
Air Quality Gulf Coast | Oil & Gas
Chemicals | Terminals

Direct: 281-664-2840
Roberto Gasparini, PhD, CCM Roberto Gasparini, PhD, CCM
Program Director
Legal & Enforcement Support
Air Quality | Modeling | Terminals

Direct: 281-664-2845
Shagun Bhat, PhD Shagun Bhat, PhD
Program Director
Air Quality | Chemicals | Refining
Direct: 281-664-2850
Andrew Parisi Andrew Parisi
Program Director
Air Quality | Rocky Mountain Region
Direct: 720-899-3914
Samantha Clark, PWS, CSE Samantha Clark, PWS, CSE
Program Director
Natural & Cultural Resources
Direct: 720-899-3913
Keisha Drayton Keisha Drayton
Operations Manager
Direct: 281-664-2804
Kelly Simmons Kelly Simmons
Business Development & Marketing Manager
Direct: 281-664-2808
Lacey Prizler Lacey Prizler
Recruiting & Operations Coordinator
Direct: 281-664-2809
Rebeca Stevens Rebeca Stevens
Senior Accountant
Direct: 281-664-2807
Johnny Vermillion, PE Johnny Vermillion, PE
Program Manager
Air Quality PSD/NSR Expert
Chemicals | Refining

Direct: 512-879-3123
Conor Merrigan Conor Merrigan
Program Manager
Direct: 720-500-3712