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Meet A Few Of Our Experts

We have over 100 QK professionals helping California clients build great communities.
Let us introduce you to just a few of them.


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  • Yohanes Makmur
    Yohanes Makmur
  • Cathy Williams
    Cathy Williams
  • Meredith Inglehart
    Meredith Inglehart
Yohanes Makmur

PE, TE, PTOE, Senior Civil / Traffic Engineer

I enjoy talking to Clients, new or existing, to listen to their stories and help them with the challenges they face. As a Civil and Traffic Engineer, I strive to deliver good projects for my client. Everytime.

Cathy Williams

PE, QSD/QSP, Senior Associate Engineer

Partnering with clients to accomplish project goals is an exciting aspect of working at QK.  I am thankful to be a part of this talented team of professionals working together to make our communities better.

Meredith Inglehart

Senior Associate Project Manager / Utility Coordinator

As a Project Manager and Utility Coordinator, I enjoy the continued relationships I have built over the years with the utility providers and  how together we support our mutual clients with their projects.


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  • Jocelyn Correa
    Jocelyn Correa
  • Steve Brandt
    Steve Brandt
  • Kristoffer Law
    Kristoffer Law
Jocelyn Correa

LSIT, Associate Surveyor

I love how surveyors get to be involved in every step of a project, from conceptual layouts to final construction.  It is extremely satisfying to begin with an empty site, and help our clients transform it into something better – in both map form, and in the real world.

Steve Brandt

AICP, Principal Planner

Working at QK allows me to utilize my professional expertise to give back to the communities where I live and grew up in and make them better places.

 

Kristoffer Law

Associate GIS Technician

As a GIS Developer, I get to create innovative solutions for our client’s unique challenges in the realm of geospatial data. Showing clients what is possible in the modern age and how to make their online cartographic systems truly state of the art is why I’m here.


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  • Dan Garver
    Dan Garver
  • Michael Ratajski
    Michael Ratajski
  • Annalisa Perea
    Annalisa Perea
Dan Garver

ASLA, Senior Landscape Architect

Designing parks is the best part of my job. Being in a sandwich generation I look at parks from my parents and granddaughters viewpoint. Layouts that look attractive could be an accessibility issue for those that are aging. And what new piece of play equipment would get my granddaughters giggling? 

Michael Ratajski

Senior Planner/Urban Designer

Working with the multi-disciplinary QK team and the clients that are attracted to our talent and expertise, as a planner and urban designer, I enjoy the many opportunities here to create great places and great communities where people can live, work, shop, play, and relax.

Annalisa Perea

AICP, LEED AP-ND, Senior Associate Planner

Working in the private sector combined with working as a contract planner for public agencies, I’m able to apply an interdisciplinary perspective to all projects, with a strong understanding of sustainability, innovate designs and socio-economic issues of the urban context. Shaping cities through good policy and proper implementation is key to building the kind of communities people take pride in.


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  • Tyler Schade
    Tyler Schade
  • Karissa Denney
    Karissa Denney
  • Curtis Uptain
    Curtis Uptain
Tyler Schade

Senior Associate Environmental Scientist

As an Environmental Scientist, I enjoy the great variety in my job, from preparing environmental documents and permit applications, performing GIS spatial analyses and habitat assessments, to conducting surveys, mapping wetlands, and identifying wildlife and plant species. It’s rewarding to help our clients complete projects and preserve our natural environment.

Karissa Denney

Assistant Environmental Scientist

Each QK individual brings a unique and special skill set, which when partnered with others, produces an experienced and talented team.

Curtis Uptain

Principal Biologist

As Principal Biologist for QK, I have a unique opportunity to use my decades of experience to mentor staff and guide a well-functioning highly diverse biological team that works together to help our clients at all levels of project development and permitting.


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  • Desmond Johnston
    Desmond Johnston
  • Jaymie Brauer
    Jaymie Brauer
  • Jerome Keene
    Jerome Keene
Desmond Johnston

AICP, Senior Planner

As a natural resource planner, it’s great to be part of this amazing QK team of professionals with diverse skills, all contributing to the shared goal of making this part of California a sustained, attractive, and high-quality place to live and work.

Jaymie Brauer

Principal Planner

Everything we do here is based on a shared vision of personal and professional excellence. I have been encouraged and challenged to use my diverse life and work experiences to provide creative solutions to difficult situations.  As a project manager, I appreciate having the independence and the responsibility to effectively manage my projects while offering the highest level of customer service.

Jerome Keene

AICP, Senior Planner

I take pride in not only assisting clients in finding reasonable solutions to their problems; but, learning daily from a diverse team of professionals about all aspects of development and applying that knowledge into our projects.


qkfooter_logoLeadership

  • Michael D. Knopf
    Michael D. Knopf
  • Janel Freeman
    Janel Freeman
  • Ronald J. Wathen
    Ronald J. Wathen
  • Amber Adams
    Amber Adams
  • Jeffery S. Cowart
    Jeffery S. Cowart
  • Garth A. Pecchenino
    Garth A. Pecchenino
  • Nathan D. Meeks
    Nathan D. Meeks
  • Spencer A. Supinger
    Spencer A. Supinger
Michael D. Knopf

PE, PLS | President

Mr. Knopf has over 40 years of professional experience.  As President of Quad Knopf, he oversees the firm’s overall operations, business development and client relationships.  As both a Professional Engineer (civil) and a Professional Land Surveyor, he is actively involved with many of the firm’s design and construction projects. He holds professional licenses in California, Nevada and Arizona.

Mr. Knopf has served as Project Manager and Principal-in-Charge on numerous projects during his career.  In these roles he has been responsible for the entire project delivery process including overall project quality, technical content, adherence to schedules and contract requirements, and conformance with project budgets.

We are here to help make a difference… for our own people, for our clients, and for our communities.

Janel Freeman

Chief Financial Officer

Ms. Freeman has been with QK since 1980. As Chief Financial Officer, she is responsible for the firm’s administrative, financial, risk management, human resources, IT and business operations. This includes the development of financial and operational strategies, metrics tied to those strategies, and the ongoing development and monitoring of control systems designed to preserve company assets and report accurate financial results.

I’m fortunate to have spent my entire career with QK and have been afforded amazing opportunities to grow along with the firm.

Ronald J. Wathen

PE | Principal Engineer / Executive Vice President / Visalia Branch Manager

Mr. Wathen brings over 23 years of professional engineering experience with a diverse background of project management, design and construction-related activities. As the Executive Vice President, Mr. Wathen is focused on the companywide organizational delivery of our professional services and meeting our clients’ business objectives with every engagement. In addition, he supports and ensures resources are available for our many talented professionals working to make a positive client experience and outcome.

I really enjoy helping our clients be successful in their business endeavors. I am fortunate to work with some amazingly talented and committed professionals. I am proud to see our QK Team consistently go the extra mile to meet our clients’ needs.

Amber Adams

Vice President of Business and Operations / Northern Region Manager

Ms. Adams is an experienced management professional who specializes in client coordination, business operations, finance and project delivery for multi-disciplined and complex projects. She serves as the Vice President of Operations and Business for QK’s offices and has over 20 years of professional experience overall. Ms. Adams excels at working with Clients to clearly define objectives and prepare scope and contracts to help agencies, firms, and individuals within the public works and planning community to ensure the successful implementation for their projects and programs.

Working with my clients and colleagues to accomplish shared objectives drives me.  Seeing community projects come to life is why I am a QKer!

Jeffery S. Cowart

PE | Principal Civil Engineer / Vice President of Quality Assurance and Municipal Services

Mr. Cowart has 30 years of civil engineering and project management experience. He currently serves as Principal Engineer, and Vice President of Quality Assurance and Municipal Services, providing design and construction administration services for large-scale infrastructure improvement projects for a number of public agencies. Mr. Cowart’s responsibilities have included providing project management services for surveying, planning, design, contract administration, and construction observation for public works projects and development projects.

Mr. Cowart leads Municipal Services to our city clients for which we contract for City Engineering Services, such as the Cities of Farmersville, Exeter, Lemoore, Corcoran, and Delano. Additionally, he serves as Assistant City Engineer for the City of Arvin.

Having been born and raised in the San Joaquin Valley, QK provides me the opportunity to work with and help our local communities develop the infrastructure and amenities to support their residents. I’m able to be part of a team of dedicated, knowledgeable and innovative people at QK that help each of our clients meet their goals and objectives.

Garth A. Pecchenino

PE, PLS, QSD | Principal Engineer / Fresno Branch Manager / Vice President of Technical Services

Mr. Pecchenino has over 29 years of experience in civil engineering and surveying projects with an emphasis in water resources, hydraulic analysis and surveying boundary research. He currently serves as Principal Engineer, Surveyor and Vice President of Technical Services, His project experience for civil related projects includes permitting/ application process, specification writing and design of new irrigation facilities, water wells, water pumping systems, wastewater treatment facilities, and storm drainage facilities. Mr. Pecchenino surveying project experience includes both office and field work that encompasses the areas of boundary, legal descriptions, construction staking and topographical surveys.

Mr. Pecchenino has served as an expert witness on various disputes related to water resources and drainage issues.

Mr. Pecchenino currently serves as District Engineer for Hilmar County Water District, Le Grand Community Service District, Midway Community Service District, South Dos Palos Community Service District, and Merquin County Water District; and City Engineer for Atwater and Dos Palos.

In the role of Vice President of Technical Services, Mr. Pecchenino has advanced the professionalism of the QK staff, structured the technical procedures and established clear internal guidelines for the completion of both technical reports and construction documents. As Branch Manager, Mr. Pecchenino provides oversight of all projects managed, and services provided through, the Fresno office. This includes the substantial amount of public works and land development projects being managed by Fresno project managers and technical professionals.

Being a QKer is living my roots, raised in the Sierra Foothills along Highway 49 makes me a 49er and as a 49er you learn to understand what personal satisfaction there is in hard work that develops positive results for your community.  The spirit of stepping into a new project is liking prospecting for minerals in the foothills, every work day I get the opportunity to either improve the well being of our clients or staff through my interaction on projects and that is the true treasure in life.

Nathan D. Meeks

PE | Bakersfield Branch Manager

Mr. Meeks serves as Branch Manager providing oversight of all projects managed and services provided through the Bakersfield office.  He is a registered Civil Engineer with over 20 years of experience in the Home Building and Land Development arena.  His experience includes Land Acquisition, Land Planning, Processing Entitlements, Land Development, Sales and Marketing, Home Construction, and Customer Service.  Prior to joining QK, Mr. Meeks was the owner of NDM Consulting, LLC where he provided consulting services to land owners and developments for Land Use Studies, Site Analysis, Architectural Review, Land Entitlements, Engineering Design, Land Development, and Construction.  He is a graduate of California State University, Chico, and is a member of the American Society of Civil Engineers (ASCE) and Past Director of the Home Builders Association of Kern County.

It is an honor to be a member of the QK Team.  Every day our team strives to design improvements to enhance the quality of life in the California Central Valley.  I am proud to participate in that effort.

Spencer A. Supinger

PE, ENV SP | Senior Associate Engineer / Merced Assistant Branch Manager

Mr. Supinger serves as Assistant Branch Manager providing oversight of all projects managed and services provided through the Merced office.  He is a registered civil engineer and project manager with over 11 years of experience. Mr. Supinger is an Envision Sustainability Professional (ENV SP) and one of only twelve Institute of Sustainable Infrastructure (ISI) approved trainers in California for the Envision rating system. His experience includes designing water, sewer, and storm drain improvements, including distribution mains, booster pumps, wells, storage tanks, and lift stations.

Mr. Supinger currently acts as District Engineer for the Hilmar County Water District and the Planada Community Services District.

I enjoy helping clients realize their vision and needs through engineering solutions. QK specializes in a wide range of projects that continue to challenge me to learn.  My favorite part of civil engineering is visiting the project site during construction to see my design come to fruition.