The Sistema Team

Joe Vallejo

Joe Vallejo

President

Joe is a graduate of Texas A&M University - Corpus Christi with over 20 years of experience in the field of IT consulting. As President and CEO of Sistema, Joe has become an expert in all things IT. He has hands-on experience handling all aspects of running an IT business including finding solutions to challenges such as staffing, project management, and producing results.

Joe’s goal is to be a steady force, the glue in the organization. He is accountable for profit & loss results, executing the company’s business plan, and leading the Sistema team to be more successful by following EOS (Entrepreneurial Operating System for Business), a complete business management system that empowers the Sistema team. Joe has lived most of his life in San Antonio, TX, and is an avid Spurs fan. Joe is a father of two children, Victoria and Joe. The Vallejo family is very involved in sports at their local CYO and spends a lot of time with their furry friends Buddy and Thor (Dogs), Ginobili (Cat), as well as raising chickens and rabbits!

John Lujan

John Lujan

Vice President of Sales

John is the co-founder/visionary of Sistema. As the Vice President of Sales, he oversees client relationships and sales. In 2012, he retired from the San Antonio Fire Department. As a former firefighter of 25 years, John’s interactions with the community have always focused on one question,” How can I help you?”. That sentiment has carried over into how he works with Sistema clients. John has over 20 years of experience in the IT consulting business.

John has lived most of his life in San Antonio, TX. Living on a small ranch in San Antonio’s Southside. He is the father of five boys, John IV, Jacob, Jesse, Christopher, Michael, and has been married to his wife Freda for 34 years. John is currently a member of the Texas House of Representatives, representing District 118. He recently took the Texas House District 118 seat, effectively flipping the historically Democrat-leaning district. This is John's second win for HD 118 in a runoff election.

Ernesto Cantu

Ernesto Cantu

Director of Business Development

Ernesto joined Sistema Technologies in 2015 with a focus on State & Local Government agencies. A graduate of Texas A&M University – Corpus Christi with a Bachelor of Business Administration, Ernesto’s focus is helping our clients with their IT initiatives including Staff Augmentation and Deliverables-Based IT Services. With over 18 years of customer service and account management experience; he has been crucial to the success of Sistema’s business growth strategies.

As the Director of Business Development, Ernesto has exemplified Sistema's core value of a strong customer service attitude. Ernesto has a passion for helping clients solve business challenges and provides end-to-end service to ensure his clients are 100% satisfied. Ernesto is a TASSCC Advisory Board Member, partnering to advance education and networking among professionals supporting Information Technology for the Texas Public Sector, and is also on the Industry Projects Committee at Austin Community College where he promotes IT courses, internships, and opportunities for future careers. In his free time, Ernesto and his wife Ljiljana enjoy traveling, going to the gym, outdoor activities and watching retro tv shows.

Deana Coleman

Deana Coleman

Operations Manager

Deana is an experienced professional who brings more than 15 years of customer service experience to her role as Operations Manager and has been with Sistema Technologies since 2017. Deana oversees the day-to-day finance and administrative functions of Sistema Technologies and serves on the company leadership team. Her diverse responsibilities included overseeing the company’s human resources, payroll, billing, and bookkeeping functions.

Deana values integrity and transparency. She is committed to doing what is best for our clients, consultants, and company. Deana considers herself a coffee enthusiast. When she’s not keeping busy at the office, she enjoys working out, traveling, spending time with her fiancé, family, and Duncan her miniature Schnauzer.

Monica Espinoza

Monica Espinoza

Business Development Manager

Monica is the Business Development Manager for Sistema Technologies for San Antonio and the surrounding.  She has worked with Sistema Technologies since August 2019.  Monica’s primary goal is to make sure that her client’s IT needs are met and to assist in anticipating and forecasting needs as they arise.  In her first project with Sistema, Monica took a lead role in providing technical training to the Texas Department of Transportation (TxDOT) for the implementation of new software deployed in the 25 district offices across the state. In addition, she was instrumental in establishing and successfully growing the first in-house Service Operation Center.

Monica attributes her success to the relationships that she has established through her 28 years in the service, sales, and training industry. She has a genuine care for people and has the heart to serve.  She feels her success has been dependent on the successes of others. Monica is a native of San Antonio and a graduate of the University of the Incarnate Word where she graduated with both her bachelor’s and Master’s in Organizational Development and Leadership.  She is married to her husband James, and they have three beautiful children; Marissa, Madeline and Andrew.  In her spare time, Monica enjoys being outdoors and spending time with her friends and family. 

Liz Flores-Perez

Liz Flores-Perez

Senior Vice President - Recruiting

Liz began her recruiting career while attending the University of Texas at Dallas and quickly became a recognized recruiting leader for national consulting firms in the Dallas Market, winning numerous awards throughout her career. Originally from Eagle Pass, Liz was raised in Dallas and relocated to San Antonio where she joined Sistema Technologies as our SVP of Recruiting in 2013. In this role, she actively manages our recruiting team across our U.S. and nearshore/offshore offices in places such as San Antonio, TX; Austin, TX; and Tampa; FL. Her recruiting team fills roles for Time & Materials and Fixed Priced Projects in the IT sector within all Industries, including State and Local Government Agencies. Her extensive recruiting experience has enabled her to mentor recruiters to operate at a high level of integrity and precision when matching client requirements to candidate skill sets.

During her personal time, Liz enjoys spending quality time with her family; her husband, their five children, and granddaughter. Her favorite sport to watch is football and her favorite NFL Team is The Dallas Cowboys. Her voice is usually gone the day after a game from cheering them on! Her son Austin is a high-functioning Autistic Young Adult, who she actively helps face challenges he encounters. Liz is very passionate about Autism Speaks and helping special needs children/adults. She also supports Peer Advocacy students who look out for other students and prevent bullying against students with disabilities.

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