Our Team




Richard Cassera Senior Land Surveyor 


Edit_Cropped_CasseraRichard requires little introduction to those who have worked in this region for some time. Chances are, if one has spent any time researching maps and records of survey on the Central Coast, they have come across many documents which bear his stamp and signature. The one word which we feel best describes Richard is “conscientious”. His work, in the field and in the office, is methodical, though performed in a timely fashion. One can always trust him to do the right thing, and he is mentoring a group of upcoming survey technicians and surveyors to do the same kind of excellent work.



Paco CastanedaEngineering Technician



Paco is a Central Coast native since 1971 with a long list of professional accomplishments resulting from his 40-plus years of experience working on local projects throughout the community. Paco is a Cal Poly San Luis Obispo Alumni, and his professional competences range from Civil Engineering, Transportation and Surveying – not to mention he’s completely fluent in Spanish. Paco’s wisdom, experience, and tenacious work ethic make him an irreplaceable asset to our team here at GTA.




Tony Coscia – Engineering Technician, EIT



We can always count on Tony to be the first person at the office each morning with an energy that is hard to match! He is currently in the process of obtaining his Professional Engineers License, and has experience in municipality compliance, stormwater systems, drainage, and public roadways. Along with being fastidious in every aspect of his professional career, Tony is also involved in local community organizations and events. He is a big part of Operation Surf, which gives Veterans the opportunity to learn how to surf to change their perspectives and overcome personal challenges. We can’t help but admire his compassion and dedication to the community, as well as GTA.


James CooperSenior Civil Engineer; PE, QSD 


_DSC1443James manages many of our survey-related projects, in close coordination with Mr. Cassera. As such, he is developing a reputation as a conscientious worker, providing excellent detailed mapping and topographic survey information. He has the ability to lead a crew in the field, and to manage the schedule and budget requirements of survey and design tasks which he is assigned. Most recently, James provided horizontal and vertical control for a critical aerial survey required for construction, verifying that all data obtained was placed on the correct datum and tied to a nearby, well-established benchmark. He has also recently helped our firm to record maps in Arroyo Grande, San Luis Obispo, and San Luis Obispo Counties.


Jeff EmrickPresident, PE, QSD, Architect


Jeff EmrickWell known throughout San Luis Obispo County, Jeff is an even-keeled, creative problem solver and teacher to his staff – known for expertise in many facets of the civil engineering industry, and for his no-nonsense, time and money-saving approaches to solving problems. As an engineer with an architect’s eye, he has an uncanny ability to see a problem before it arises, and generate a solution before it becomes a problem. Jeff is heavily involved in the design and management of all of GTA’s projects, with extensive experience which ranges from roundabout design, oversight of pavement rehabilitation projects, to unique ADA accessibility design, home design and large backbone infrastructure projects.


Jenny EmrickProject Manager



Born and raised on the Central Coast, Jenny has been working in the local development community for over 10 years. This makes her well-suited to navigate local agencies and facilitate expedited processing whenever possible. She is responsible for working closely with clients, consultants, agency staff to ensure that goals and milestones are met throughout every phase of the land planning process.




Jim GaringSenior Principal Engineer, PE


_DSC1424Jim served as the City Engineer for the City of Grover Beach from 1981 – 2011, and still serves as the City’s Water and Wastewater Engineer to-date. Known for his many fascinating, thrilling hobbies (such as flying and racing), he is also quite well known and sought after for his knowledge of water supplies in the area as well as his nearly encyclopedic knowledge of the history of the Five City’s regional roadway and utility infrastructure systems. Nearly all of Jim’s 40+ years of experience are in public works and his passion to pass on his legacy of service to the City of Grover Beach thrives within our office. Rest assured, if there is an existing issue within some existing infrastructure, he is well aware of it – and our staff has taken note.


James GilletteSurvey Technician


James-G-reduced-sizeWe can always count on James to have a contagious smile on his face when he walks in, and his uplifting attitude and good-hearted nature is hard to ignore. You can tell he loves what he does, and every time he goes out into the field we know we can rely on him to get the job done. James has over 10 years of drafting and survey experience, including ALTA surveys, topographic maps, lot line adjustments, staking, field surveys, final maps, easements, construction monitoring, and setting monuments. James is also a member of the International Union of Operating Engineers Local 12 and the Southern California Surveyors Joint Apprenticeship Committee.


Kelby Johansen – Engineering and Survey Technician



After an education and brief career in aeronautical mechanics, Kelby has joined GTA to gain knowledge and experience in land surveying. His versatility and ability to switch between field and office technician have made him an invaluable asset to the team. When he isn’t out with the crew or assisting the civil or survey departments with drafting needs, he can usually be found in the garage. Maintaining our assortment of survey equipment and fleet vehicles is a cakewalk for someone who used to build and repair satellites! It’s not surprising to find Kelby’s wetsuit and surf gear on his truck in the morning, and we respect the way he greets the day, and us, with dedication and genuine excitement to get started.



Perry McBethEngineering Technician, EIT


Perry_Cropped_EditAt GTA Perry is gaining valuable experience in civil design in pursuit of his Professional Engineers License. In addition, he has spent time in Surveying and Storm Water Management, where his tasks include construction staking, topographic surveying, and storm water inspections and reports.






Lisa Mirau Administrative Assistant


lisa-2018-resizedLisa has lived on the Central Coast for 25 years and provides our office with essential organizational support and a positive work environment. Admin tasks include daily timesheet organization and distribution, as well as answering and appropriately directing customer calls. Her 20 plus years of experience in customer service and management roles are valued and highlighted by her eye for detail and quick-thinking abilities.




Janae Perry – Office Manager



With over 8 years of experience in the field  of business administration, Janae is focused and dedicated to maintaining a successful business in all aspects of daily administrative tasks. She has an extensive knowledge of accounting practices and successfully manages A/R & A/P accounts, correspondence, inventory, financial reports, and marketing.





Mike Ratty – Senior Civil Engineer, PE


Edit_Cropped_RattyMike has 40 years of experience in most aspects Civil Engineering from basic design to construction management. He has also been a part of the engineering and construction for improvements of sewer and water treatment plants for various districts in San Luis Obispo and Santa Barbara Counties. In recent years, Mike has been involved in the street design and other projects for the City of Grover Beach.




William Rebik – Senior Civil Engineer, P.E., L.S.



Bill has over 30 years of Engineering and Design experience on the Central Coast, including grading and drainage, sanitary sewers, water infrastructure, utility coordination, hydrology and hydraulics, storm water control plans, and public roadways. He is also a licensed surveyor, and his wide range of knowledge plays an important role in all our projects. Bill’s ability to hit the ground running and his diligent, meticulous nature all contribute to the standard of excellence GTA is known for.  When he’s not at work, Bill and his wife love to square dance and scuba dive, and enjoy traveling for both.


Ronald Reilly – Vice President, PE, QSD


Edit_Cropped_ReillyA resident of Grover Beach, known to attend and provide a citizen’s voice at many City Council meetings, Ron leads from his drives to serve his community, to save his client’s valuable resources, and his drive to succeed in building a team which takes great pride and joy in what they do each day. With over 11 years of well-rounded civil engineering experience, he has served in a variety of capacities, ranging from commercial land development design and project management, to engineer-of record for large public-private partnerships and project engineer for large industrial and commercial backbone infrastructure development.



Adam StanfordEngineering Technician 



Adam has 20 years of drafting experience with computer aided design software for engineering (AutoCAD) combined with land survey experience in the field.  He also has an interest in graphic design which he uses to clearly present the project.  His background includes a variety of work – private residences, commercial development, public improvement plans, topographic mapping and construction staking.  A Central Coast resident for most of his life, Adam enjoys working with our engineers to develop state of the art projects that benefit our local communities.