• 3450 Lang Road, Houston, TX
  • 713-690-7328




Ninfa G. Pérez

Co-Founder and President

Ninfa is one of Gretna Machine Shop’s co-founders and is now president of the company. With a no-nonsense attitude and the tenacity of any CFO, Ninfa has been instrumental in Gretna’s ongoing success. With more than 30 years of accounting and finance experience, Ninfa manages the company’s overall financial health. She graduated from El Colegio de Manizales in Colombia.


Nubia A. Pérez-Blaine

Vice President and
Director of Strategic Planning

As Gretna’s vice president and part-owner, Nubia helps plan and execute the company’s short and long-term goals with a focus on cost reduction and strategic planning. Previously, Nubia worked for Gazprom Marketing & Trading, USA, a subsidiary of the world’s largest natural gas company. Nubia has an undergraduate degree from St. Mary’s University, and an MBA from Rice University in Houston.


Nancy Pérez-Vargas

Vice President and Director of Marketing

Before working at Gretna, Nancy founded a successful advertising and marketing company in Atlanta, Ga. Now, as vice president and part-owner, Nancy continues to bring her invaluable marketing and entrepreneurial experience to Gretna. Nancy obtained a bachelor’s degree in marketing and international business from St. Mary’s University in San Antonio, and later attended the Portfolio Center School for Art Direction and Design in Atlanta.

Built on traditional values and still family-owned,
Gretna has grown into a modern, first-class machine shop

We have of team of more than 50 employees operating in a 50,000-quare-foot, state-of-the-art,
fully air-conditioned facility.



Natalia Jimenez

Production Manager

As production manager, Natalia schedules, expedites and oversees purchasing of material and outside processing. She has worked at Gretna since 2001. Natalia earned a bachelor’s degree in civil engineering from EAFIT in Medellín, Colombia. She is dedicated to making processes more efficient and oversees quoting, order processing, scheduling and expediting of jobs.


Debbie Dostalik

Office Manager

With more than 20 years as a Gretna team member, Debbie is the backbone of all administrative activities. Maintaining rigorous dedication to detail, she oversees the company’s day-to-day requirements regarding finance, accounting, human resources and regulatory compliance.


Dennis Henriquez

Shipping & Receiving Manager

Dennis has been part of the Gretna team over 15 years. Before joining Gretna, he was in the military as a second    lieutenant in his native country. He now brings his appreciation for timeliness and order to the shipping & receiving department, which is ultimately responsible for Gretna’s 100% On-Time Delivery to customers.


Paula Stogsdill

Calibration and Verification

Paula has 25 plus years’ experience with manufacturing in Quality Control as an electrical and mechanical inspector in the energy and aerospace industries. She received her experience in ISO 9000:1994 in 1996 and from there became a lead auditor in 1999 for ISO 9001: 2008 and AS9100. She enjoys mentoring others and passionate about helping people to succeed.

David Sieg

Quality Control Manager

David  joins Gretna with 15+ years of experience in the quality assurance, quality control and quality improvement, which includes at one of the biggest fortune 500 companies in both energy and aerospace.  His approach to quality is inline in how Gretna’s standards has set itself apart as one of the top machine shops in Houston for the last 40 years. Under David’s direction, Gretna will continue to perform at the level that our customers expect.