Management Team

We Are Your

Knowledgeable Label Experts

The Shamrock team is here to assist you with everything from label design to selection of the exact paper and adhesive combination that will result in the precise label, custom engineered, to meet your unique needs.

David Klonowski

General Manager/Chief Financial Officer

[email protected] 12 years of service

As GM and CFO, Dave is responsible for the core business of both Shamrock Labels operations  – Bellwood, Illinois and Orange, California, including but not limited to financials, manufacturing, human resources and facilities management.  During his tenure, Dave has worked hard to improve Shamrock’s operating performance through the implementation of new procedures, new technologies and improvements to the business infrastructure while ensuring that our valued and loyal customers continue to be a priority for our team.  Dave attended Northern Illinois University where he earned both a Bachelor’s degree in Finance and his Master’s degree in Business Administration.  Dave’s hobbies include walking, bicycling, golf and spending time with his family.

Kevin Gerhard

Vice President, Sales & Marketing

[email protected] 10 Years of Service

Kevin has oversight for overall brand management for Shamrock Labels, including the sales organization and marketing/communications initiatives.  Kevin is deeply passionate about improving the customer experience through excellent products, quick and simple service and sharing best practices throughout the customer community.  Kevin earned his Master’s in Business Administration from Loyola University – Chicago and his Bachelor’s degree in Psychology/Management from Miami University (OH).    Outside of work, Kevin loves to read, play golf and spend time with his wife and two daughters.

Shirin Malik

Director, Corporate Contracts & Customer Care

[email protected] 17 years of service

Shirin has come a long way since beginning her career at Shamrock Labels as a Customer Service Representative in early 2000.  Her customer focused attitude has contributed to the development of an inside Customer Service team that is always willing to go the extra mile for the customer.  Shirin has also brought a fresh perspective into the way Shamrock works with customers, bringing them quality and value, on terms that allow customers to reduce costs and better manage inventory levels.  Shirin earned her Master’s in Business Administration from Purdue University and her Bachelor’s degree in Criminal Justice from Loyola University – Chicago.    At home, Shirin enjoys gardening, riding her motorcycle, and spending time with her fiancé, children, and two Yorkies.

Mark Siekierski

Director of Operations

[email protected]

With over 30 years’ experience within the printing industry, Mark brings a strong technical background and strategic team oriented approach for directing operations in Bellwood, IL and Orange, CA. Mark is focusing on process management, production efficiency, quality control, warehousing, logistics, facility safety, KPI’s and R&D. Mark is passionate about ensuring Shamrock is manufacturing customer orders correctly, on time and efficiently. Mark earned his Associates of Applied Science Degree in Graphic Arts from College of DuPage in Illinois.

Tahir Ahmed


[email protected]

As Controller, Tahir is responsible for oversight of the company’s Finance department including preparation of financial statements, cost analysis, budgeting, audit, AR/AP and tax compliance. Tahir also has oversight over the Human Resources function including payroll and employee benefits administration and Shamrock’s Information Technology support function. Tahir has over 15 years of experience in the Medical Device and Pharmaceutical industries including manufacturing, distribution, operations and finance. Tahir worked through implementation of new procedures, new technologies, ERP and helped build improvements to the business infrastructure. Tahir did his undergraduate in Toronto, Canada and completed his MBA at Lake Forest Graduate School of Management. Tahir’s hobbies include walking, bicycling, tennis, hockey and spending time with his family.

Tony Lehman

National Sales Manager

[email protected] 10 Years of Service

Tony spent his first seven years with Shamrock as an Outside Sales Consultant, focusing on providing his customers with the best service while building long-lasting relationships.   His customers loved his quick responsiveness and his willingness to do whatever they asked.  In 2014, Tony earned an opportunity to become the National Sales Manager, sharing his experiences and best practices with the rest of the Shamrock Outside Sales team.  Tony’s strong work ethic is an example of how hard he and his entire team will continue to look for ways to improve on our existing service levels.  Tony is an alumnus of University of Illinois at Chicago.  He has a wife and one daughter.  He enjoys fishing and he loves to travel, particularly adventurous locations like South Africa, Italy, Poland, Egypt.

Criselda Jackson

Client Care Manager

[email protected] 1st year of service

With over 17 years of Global Customer Order Management experience, Criselda is a pro-active leader who aims to deliver customers a great overall customer experience. In 2017, Criselda joined the Shamrock organization as the Client Care Manager. She is charged with building and maintaining process efficiencies that foster customer trust throughout the entire customer experience. Outside of work, you can catch Criselda enjoying family time with her 3 sons and husband or curling up to a good book.

Casey Ostrowski, Jr.

Assistant Shop Manager

[email protected] 12 years of service

Casey has over a decade of experience in the flexographic printing industry.  Casey is experienced in operating multiple flexographic printing presses to convert paper and synthetic materials, also including flat-back tapes. Casey is also experienced and capable of leading production operations; including typesetting plates, formulating standard to customized inks, customizing dies for particular orders.  Casey is an invaluable resource for recommending materials to meet any customer’s need and he places a high level of importance on quick turn-around times to drive high levels of customer satisfaction.


"The whole team at Shamrock is easy to work with, ordering is simple and the labels are exactly what we need."