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Our History
SQE was founded in 2013 in Austin, Texas by Susan T. Litherland, P.E. and Quintin McNulty, P.E. Sam Enis, P.G. joined as a Principal Project Manager in 2015. Together, they bring together nearly 75 years of diverse environmental experience to commercial/industrial, oil and gas, legal, and real estate markets. SQE is a woman-owned business.
![NRP_7204-Edit.jpg](https://static.wixstatic.com/media/18b9fd_c23ca4b2e30c46c0816be9ca9923718d~mv2_d_2400_3600_s_4_2.jpg/v1/crop/x_0,y_446,w_2400,h_1832/fill/w_301,h_230,al_c,q_80,usm_0.66_1.00_0.01,enc_auto/NRP_7204-Edit.jpg)
Susan Litherland, P.E.
Susan received a B.S. in Chemical Engineering from the University of Texas and has over 35 years of environmental engineering experience.
Quintin McNulty, P.E.
Quintin received a B.S. in Civil Engineering from the University of Texas and has over 20 years of environmental engineering experience.
![NRP_7250-Edit.jpg](https://static.wixstatic.com/media/18b9fd_bce375333dd74ae297823bef4cdff7a2~mv2_d_2400_3600_s_4_2.jpg/v1/crop/x_0,y_486,w_2400,h_1832/fill/w_302,h_230,al_c,q_80,usm_0.66_1.00_0.01,enc_auto/NRP_7250-Edit.jpg)
![NRP_7357-Edit.jpg](https://static.wixstatic.com/media/18b9fd_5faaa807d8894f21a24abc83bcc47a2b~mv2_d_2400_3600_s_4_2.jpg/v1/crop/x_0,y_414,w_2400,h_1832/fill/w_301,h_230,al_c,q_80,usm_0.66_1.00_0.01,enc_auto/NRP_7357-Edit.jpg)
Sam Enis, P.G.
Sam received a B.S. in Geological Sciences from the University of Texas and brings over 12 years of environmental experience.
Professional Staff
Our staff includes a wide variety of professionals with backgrounds in chemical and civil engineering, geology, and environmental sciences. We leverage professional staff with experience in engineering design, geology/hydrogeology, air quality, construction management and estimating, geographic information systems, computer aided design, data management, and risk assessment.
SQE is a Woman-Owned Business
![CityOfHoustonSeal.gif](https://static.wixstatic.com/media/18b9fd_87f9b0aa1bfe43d1afaee88b030f97e9~mv2.gif)
SQE is registered as a Women Business Enterprise (WBE) with the City of Houston. No. 14-12-12768
![hubSeal.png](https://static.wixstatic.com/media/18b9fd_67c542c6a9e64500b1674357cb60be27~mv2.png/v1/fill/w_60,h_60,al_c,q_85,usm_0.66_1.00_0.01,blur_3,enc_auto/hubSeal.png)
SQE is registered as a Historically Underutilized Business (HUB) with the State of Texas. No. 483431
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SQE is certified with the National Women's Business Enterprise Council. No. WBE1600327
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