Chicago - Home Office

In the 1920s, Graycor’s predecessor, the Chicago Concrete Breaking Company, began providing specialty contracting services throughout Chicagoland. Over the next 90-plus years, Graycor grew into a group of companies that now include Graycor Construction Company, Graycor Industrial Constructors and Graycor International. These companies now complete hundreds of millions of dollars in annual revenue for industrial and commercial construction and maintenance projects across the U.S.

Chicago was chosen for Graycor’s headquarters because it reflects the company’s deep Midwestern roots and provides a key transportation hub to and from project sites, which can be anywhere in the country. Located just outside of Chicago in Oakbrook Terrace, Illinois, Graycor’s corporate office offers direct access to project sites via major highways, airports and rail systems, while world-class dining, arts and sporting events make the area an ideal destination for business and recreational activities. Other key features include Chicago’s proximity to top-tier universities and strong labor pool for talent recruitment, along with Graycor’s state-of-the art LEED-certified corporate facility which promotes collaboration and employee wellness.

Buildings Team

Dave Wing Tim Hanifin John Shannon Tim Glenn Steve Crowley Michelle Galindo

Dave Wing


As President, Dave is responsible for providing strategic leadership and direction to the overall operations of Graycor Construction Company. Dave champions company resources to lead strategic planning, continuous improvement, business development efforts for the commercial markets across throughout the U.S., Canada and Mexico, provides senior management leadership and deploys the necessary resources to ensure client satisfaction through Graycor’s value added services. With a deep commitment to continuous improvement, Dave’s vision for the company is to create an environment that promotes employee development through mentoring talent and performance management, best practices and business excellence. In 1991, Dave joined Inland Construction (predecessor to Graycor Construction Company Inc.) as an engineer and has held roles of increasing responsibility including assistant project manager, project manager, senior project manager, general manager, vice president and senior vice president. Dave earned his Bachelor of Science in Construction Management and Civil Engineering from Bradley University.


Tim Hanifin

Vice President, General Manager (Retail + Entertainment)

As General Manager of Graycor's Retail & Entertainment market, Tim oversees a team of dedicated construction professionals providing preconstruction and construction services to the nation's leading real estate developers, retailers and theatre operators. During his 20-year career at Graycor, Tim has held a series of increasingly responsible positions including project engineer, project manager, senior project manager and construction manager and has spent the majority of his career on the core project types of shopping center redevelopments and renovations. Tim earned his Bachelor of Science in Civil Engineering (Structural) from Northwestern University.


John Shannon

Business Development Manager

As Business Development Manager, John is responsible for supporting Graycor Construction Company’s market leaders by identifying and developing new business opportunities for growth of the company’s commercial markets across broad geographies. He supports the leadership team through evaluating business strategies and establishing timely market plans. John mentors Graycor’s senior management leadership helping to inspire a great development acumen for realizing new business opportunities and growing established relationships. In 2000, John joined Graycor Construction and leverages more than 20 years of professional sales achievements since earning his Bachelor of Arts degree in Public Relations from the University of Kentucky.


Tim Glenn

Vice President, Estimating

Tim joined Graycor Construction in 2002 and serves as Vice President of Estimating. Bringing more than 35 years of estimating experience, Tim’s expertise in preconstruction, pre-planning, estimating, value management, constructability reviews, procurement and logistics planning ensure clients meet their budgetary goals while achieving design intent. Tim manages Graycor’s team of estimators to ensure seamless delivery of preconstruction services that results in detailed, accurate and complete estimates on every project. Tim earned his Bachelor of Science in Construction Management from Michigan State University.


Steve Crowley

Construction Manager, Chicago Market Leader

Steve joined Graycor Construction Company in 1999 and serves as Construction Manager and Chicago Market Leader. With more than 22 years of construction industry experience, Steve has managed projects in the corporate office, government, healthcare, senior living, hospitality, solar and retail industries for clients such as Advocate Healthcare, Cedars Sinai Medical Center, BP, Marriott, CVS/pharmacy, Walgreens, Urban Retail Properties and Westfield Corporation. Furthermore, as Graycor’s Integrated Project Delivery (IPD) and Lean Champion, Steve spearheads the firm’s Lean initiatives including company-wide training on Lean techniques. He is a registered Professional Engineer in the State of Illinois, a LEED Accredited Professional and earned his Bachelor of Science degree in civil engineering from Valparaiso University


Michelle Galindo

Business Excellence Manager

As the Business Excellence Manager, Michelle leads the Business Excellence program for Graycor Construction Company. Her main focus is improving the company’s overall business processes—The Graycor Way, a Continuous Improvement Process—to deliver higher value to our clients and stakeholders. Michelle also leads and implements Graycor’s Quality program on all projects nationwide. Michelle has more than 12 years of successful achievements in the construction industry with international experience working across the U.S. and Mexico. Michelle earned her Bachelor of Science in Civil Engineering from the University Autonomous of Ciudad Juarez (Mexico), completed advanced graduate studies in Company-wide Quality and Productivity Management in the Central Japan Industries Association in Nagoya, Japan and holds a Masters in Construction Project Management from the University of Manchester in England, UK. Michelle is a certified Manager of Quality/ Organizational Excellence by the American Society of Quality (ASQ).


Industrial Team

Sam Potter Shawn Anderton Joe George Tim Mielke Kevin Grooms Mike Murphy Pat Gallen Gary Renken

Sam Potter


As President of Graycor Industrial Constructors Inc., Sam Potter oversees Graycor Industrial’s estimating, business development and operations efforts. Sam joined Graycor in 2002 and worked in numerous roles including project controls, project management and estimating. His work experience includes supporting a variety of projects within the metals, power and process markets served by Graycor Industrial. Sam, who is a registered Professional Engineer, received a B.S. in civil engineering from Iowa State University and is a member of the American Society of Civil Engineers.


Shawn Anderton

Vice President & General Manager, Western U.S. Operations

Shawn Anderton is Vice President and General Manager, directing and overseeing Graycor Industrial’s construction work within the U.S. western region. Shawn brings over 25 years of experience in project controls, estimating, project management and operations in the process, power and gas infrastructure markets. A graduate of Kansas State University, Shawn earned a B.S. in mechanical engineering.


Joe George

Vice President & General Manager, Power, Eastern U.S.

As Vice President and General Manager, Joe George leads Graycor Industrial’s power work in the eastern U.S., focused on environmental upgrades of fossil plants, new power generation facilities as well as transmission and distribution work. Joe brings more than 30 years of experience in project controls, project management and operations including civil, structural, equipment and piping experience in the industrial arena. Joe has been with Graycor for nearly 20 years achieving positions of increasing responsibility. He earned a B.S. in construction engineering from Iowa State University.


Tim Mielke

Project Director, Oil, Gas & Chemicals, Eastern U.S.

As Project Director, Tim Mielke is responsible for overseeing the company’s oil, gas and chemicals projects in the eastern U.S. With more than 33 years of industrial construction experience—with an expertise in process piping and mechanical erection—Tim began his career with Graycor Industrial in 2010 as Chief Estimator in charge of the company’s process project bids. Earning bachelor of science degrees in business administration-finance and economics from Minnesota State University, Tim also holds an M.B.A. degree in strategic management from the University of Minnesota. He is a member of the Mechanical Contractors Association of America.


Kevin Grooms

Project Director, Gas Infrastructure + Power, Eastern U.S.

Kevin has over 24 years of experience in the construction industry primarily managing large, complex industrial projects. He began his career with Graycor as an intern and evolved into positions including project engineer, superintendent, project manager, construction manager, project executive and project director. Working in union environments, Kevin has a vast understanding of construction projects. In his role as Project Director, Kevin oversees the company’s gas infrastructure and power markets in the U.S. Eastern Region. He holds a bachelor of science degree in construction and an associate degree in civil engineering from Purdue University.


Mike Murphy

General Manager, Operational Services

Bringing more than 30 years of experience in the power and refining industries, Mike recently joined Graycor Industrial Constructors as General Manager of Operational Services. In his new role, Mike supports the company’s construction and business operations across all its divisions. In addition, as a member of Graycor Industrial’s leadership team, he oversees safety, quality and project controls, as well as supports recruiting and ongoing employee training and development. Mike holds a bachelor’s degree from the University of Pennsylvania and a master’s certificate in commercial construction management from Villanova University.


Pat Gallen

Business Development Manager, Gas Infrastructure + Power, Eastern U.S.

Pat Gallen joined Graycor Industrial in 2016 as Business Development Manager, and is responsible for leading business development, sales and marketing efforts for Graycor Industrial’s gas infrastructure and power groups. Pat earned a bachelor’s degree in business administration from Governors State University and brings more than 23 years of sales and management experience in the power industry.


Gary Renken

Business Development Manager, Oil, Gas & Chemicals, Eastern U.S.

Gary Renken recently joined Graycor Industrial as a business development manager responsible for supporting and growing the company’s efforts in the oil, gas and chemicals sector throughout the nation’s eastern region. Based out of Graycor’s headquarters in Oakbrook Terrace, Illinois, Gary has more than 30 years of industrial construction experience and holds an M.B.A. degree from St. Xavier University-Chicago and a bachelor’s degree in accounting from University of Illinois at Chicago.