CSD Services is a structural steel detailing firm with 35 years of experience in structural and architectural miscellaneous steel detailing. CSD Services started in Lubbock, TX as Callaway and Company in 1983. In 2006, Greg Callaway, President, re-located and restructured the company into CSD Services, Inc. and setup HQ in Friendswood, TX., a suburb of Houston. CSD Services uses the latest technology to provide accurate and timely drawings to our customers. Our dedicated, experienced staff is what makes CSD Services stand apart from other detailing firms. Our staff is professional, well- trained and ready to meet the individual needs of our customers.


Greg Callaway


Greg began working in the steel industry at the age of 15 in the Mosher Steel Detailer Training Program and started his first detailing business at the age of 22 working out of his home. With an entrepreneur spirit, Greg opened up a steel detailing office in Lubbock, TX. in 1983. With over 40 years of experience, Greg is extremely knowledgeable in all phases of the structural steel industry. Greg enjoys bike riding, kayaking, fishing and spending time with his wife, 4 children and 6 grandchildren.

David Barajas

Vice-President of Operations

David is a native Texan, but raised in Madrid, Spain as a proud military brat of a US Air Force member. He has a Masters in Information Technology and was owner of a Tech Service Company before joining CSD in 2006. David enjoys physical fitness, fishing and supports the MS Society and the Alzheimers Assoc.

Kevin Adames

Vice-President of Production

Kevin has 13 years of detail structural design and drafting experience in the oil and gas industry, 5 of which were spent leading or managing drafting/design teams. Kevin received his degree in Operations and Project Management from Southern New Hampshire University and is set to begin his master program in Operations and Project Management in September of 2018. He joined the team at CSD Services in May 2018 as a project manager. Kevin enjoys spending time outdoors with his wife and 3 children, coaching baseball, kayaking, hiking, fishing and swimming. Kevin loves to workout, hunt, golf, and he and his family are huge Disney fanatics with a Disney home base at the Polynesian

Project Managers

Kevin Neu

Senior Project Manager

Kevin has 22 years experience in structural steel detailing/checking with 7 years as a project manager. Kevin has a Bachelor of Science in Architectural Studies from the University of Texas. He is proficient in AutoCAD, drafting with manual tools and trained in 3D modeling software Kevin is very involved in his church and an active volunteer in his community.

Krissy Delagarza

Asst Project Manager

Krissy has 11 years experience in the steel industry and has been with CSD for over 6 years.
She has 25 years in accounting and administrative experience as well as document control including COR’s,
scheduling, job cost & RFI’s.
Krissy is driven to keep projects moving and on schedule along with providing excellent customer service.
She loves to cook, bake, watch the Rockets and spend time with her children and grandson.

Gabriel Bustamante

Asst Project Manager

Gabriel is Fitter / Welder by trade and has 15 years experience in shop fabrication and field erection, giving him a stron background in Structural Steel.

He received his A.A.S. in Computer Aided Drafting & Design in May 2011 from San Antonio College and has 12 years experience in Architectural, Structural and Mechanical
Drafting & Design, with additional experience as Project Lead and CAD Coordination.

Even with all this great experience, Gabriel is currently pursing a B.S. in Operations / Project Management.

Brent Harlow

Sr. Structural Detailer/Project Manager

Brent has 24 years of experience in structural steel detailing. Brent has A.A.S. in Drafting/Design Tech from Victoria College, AutoCAD Certificate from North Harris College and SDS/2 Basic Training from Design Data. Brent enjoys canoeing.

Virginia Escobedo

Asst Project Manager

Virginia currently co-manages projects as an assistant to Greg Callaway. She has 15 years’ experience in the construction industry. She began her career in document control and is training to become a project manager. Virginia resides in Friendswood, TX with her two children, Malik & Mia

Structural Steel Detailers

Bhavesh Gajjar (BG)

Sr. Structural Detailer/Checker

BG has over 20 years work experience in the structural engineering field. BG has a Bachelor of Engineering degree in Civil Engineering. He also received a Certificate in Elementary Structural Design from the University of Toronto. BG has successfully completed training courses in Tekla Structures, Supervisory Management, AutoCad-3D Modeling, Quality Control and ISO 9000, Quality Management and Network-Centered Computing. BG enjoys reading religious books and attending religious lectures, classes and events.

Arvin Martinez

Structural Detailer

Arvin has 6 years’ experience as a 3D Modeler/Detailer. He received a Bachelor of Science in Civil Engineering at Bulacan State University Phillippines. Arvin enjoys computer games and is a basketball fan.

Alma Duenas

Sr. Structural Detailer/Checker

Received an Associated degree in Electro-Mechanical Drafting in 1995 and began working for Callaway and Co. in 1996. Alma’s duties have included Detailer, Project Coordinator, Checker and Detailing Trainer in AutoCAD and SDS. She has 12+ years’ experience in SDS and 20+ years’ experience in AutoCAD. Alma enjoys reading, crafts, watching movies and spending time with her family.

Jesus Ramos

Sr. Miscellaneous Detailer

Jesus was born in Mexico where he studied Civil Engineering. Jesus has 23 years of steel detailing experience. He began his career at Beck Steel in Lubbock before coming to work at CSD 8 years ago. Jesus enjoys playing the guitar and spending time with his family.

Lolit Gutierrez

Sr. Structural Detailer/Checker

Lolit has 28 years of experience in steel detailing and first began working for Callaway and Co in 2000. She has a Bachelor of Science in Architecture and is proficient in SDS2 and AutoCAD. Lolit enjoys doing crafts with her twins, baking pastries and water color painting in her free time.

Ming Yin

Structural Detailer

Ming has a Bachelor of science from Beijing University, China and a Ph.D. in Chemical Engineering from Louisiana State University.

Ming comes to CSD Services with 11 years experience in structural 3D modeling/detailing and he enjoys badminton, swimming and travel.

Document Control

Donna Brock

Document Control

Donna has 26 years of experience in document control along with experience in project management, purchasing, production management, safety and ISO compliance. Donna enjoys movies, theater and baseball (avid Astros fan).

Victoria Pursel

Document Control

Victoria joined CSD Services in 2018 as a document control specialist with experience in the O&G Industry.

She enjoys spending time with her family and her 4 dogs.


Patsy Callaway

Accounting/Human Resources

Patsy has over 40 years’ experience in accounting and 15 years’ experience in Human Resources. Experienced in Quickbooks and Peachtree software along with experience in all phases of accounting, insurance and legal documentation requirements for employees and business. Patsy enjoys gardening, sports and spending time with her family.

Fallyn Bugaj

Accounting Clerk

Fallyn has worked in the Maritime business for over 5 years then changed careers to work in Childcare as an Assistant Director/Director when she had her first child.

She has over 10 years of data entry experiences along with shipping and receiving and, other office related duties.

Her experience in Quickbooks and other Office Applications brought her to CSD Services to join the Accounting Dept.

In her free time she loves to spend time with family, she enjoys cooking, baking and gardening.