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Isael Posadas, P.E., C.F.M.

Mr. Posadas obtained a Bachelor of Science in Civil Engineering from Texas A&M University-Kingsville.  His experience includes hydrologic/hydraulic studies, private and public infrastructure projects, feasibility studies, annexation/zoning issues, public presentations, preparation of engineering plans and specifications, bidding and contractual processes, construction management, public policy development, Right-of-Way acquisition, Stormwater Management and development planning.  Most recently, as the City Engineer for Edinburg, Texas, he designed, bid and performed construction management for over $11 Million in infrastructure projects and reviewed/approved over $50 Million in municipal projects designed by others.

Mr. Posadas has a strong management background having direct oversight of Edinburg’s Engineering Department, Public Works Administration, Utilities Administration, and the Edinburg International Airport.  He has also previously held the top management position for the Harlingen Waterworks System and worked for the City of McAllen’s Engineering and Public Utilities Departments.  He is licensed as a Professional Engineer in Texas and is also a Certified Floodplain Manager.

Jessica Jean Posadas, Project Development / Business Manager

Mrs. Posadas obtained a Bachelor of Arts from the University of Texas – Pan American and has a diverse background in business development having worked in various capacities in the banking industry.  Her role in the firm includes quality control and quality assurance, ensuring that projects remain on course with the client’s schedule in mind.  In addition, she provides our clients with access to information on the progress and status of projects during the design and construction phase.


Isidro Fernandez, Project Coordinator / Designer

Mr. Fernandez obtained an Associates of Applied Science from Texas State Technical College.  His experience is wide-ranging, having performed in a technical and management capacity over the last 11 years in the private and public sector.  As an urban planner for the last 6 years, Mr. Fernandez has developed the skills to support complex project planning.  He has been recognized for his planning abilities and received national recognition for the 2007 Community of the Year Award and 2007 Planning Award.

Mr. Fernandez has demonstrated a working knowledge of the Texas Local Government Code, Texas Commission on Environmental Quality (TCEQ), Texas Water Development Board (TWDB) Rules, County Development Regulations, and Stormwater Management Regulations.


Pilar D. Park, CESSWI - Project Coordinator / Office Manager

Mrs. Park served as Stormwater Coordinator and Right of Way Acquisitions Coordinator for the City of Edinburg. Mrs. Park comes to SDI Engineering with a combined 20+ years experience in Construction Management, Stormwater Management, Water Rights, Right of Way Acquisitions, Grantwriting and Grant Administration.


Leo Dan Posadas, Project Coordinator / Field Inspector

Mr. Posadas has been in the building and construction industry for over 20 years.  He has a strong management background and solid performance with respect to building materials and their installation.  His role in the firm is to ensure the timely progression of projects in the field and quality control and quality assurance in their installation.  In addition, Mr. Posadas performs field inspections, utility coordination and cost control management on our projects.  His unique ability to “get the job done” with a wide array of contracting disciplines makes him an invaluable asset to the firm and our clients.