Dan Dieck, CEO
Dan Dieck specializes in executive level searches. Dan is a co-founder of International Retained Search Associates (IRSA), which is a global organization of boutique search firms.
Dan founded Dieck Executive Search in 1985. With over 25 years of sales and management experience, Dan leads the direction of the firm. Over the years, Dan has developed a high degree of loyalty from the firm’s client base, which includes private, medium size, first stage and Fortune 500 companies. His client focus translates into an aggressive, results-oriented style of recruiting that allows him to consistently deliver desired results.
The Dieck Executive Search guiding principles have paid off for the firm and its clients. The organization has completed 99% of all retained search projects since 1985…a reflection of the passion and diligence which the company employs to meet its client’s needs. Dan believes that people are a company’s most valued asset.
Don Madelung, Sr. Search Consultant - Professional Services Practice Leader

Don Madelung specializes in serving for-profit and non-profit organizations.
Prior to Don’s executive search career, Don served as the President of Herzing University. Prior to that, he was Associate Executive Director, Concorde Career Colleges (formerly CenCor), District Financial Aid Director, Kansas City Metropolitan Community College System; Director of Admissions & Financial Aid, Avila College and Vice President for Mitchell Sweet & Associates.
Don is a results oriented, objective, driven leader with a reputation for improving situations and attracting the top talent in the marketplace. Having led a university, he has walked a mile in the shoes and fully understands the challenges of leadership and talent acquisition.
Don serves on several civic and community boards. With over 25 years experience in senior leadership roles in education and non-profit organizations, Don is uniquely qualified to lead the Professional Services sector for Dieck Executive Search.
Eric Koppa, Director of Business Development and Administration
Eric leads the firm’s administrative, financial, business development, and research functions. He coordinates all business development efforts with Dan Dieck, CEO.
Related Experience:
Russell Reynolds Associates – Chicago, IL
Administrative Support & Assistant Office Manager
Responsible for daily administrative and executive support; maintained all office systems, oversaw the production department, and worked closely with the research department and office manager on administrative projects.
Perspective Real Estate – Commercial RE Consultant – Chicago, IL
Consulted with business owners, building owners, and leasing agents on complex commercial leasing agreements; won business through careful communication, market competency, relentless drive, and concise follow-through.
Joshua Dillahunty, Market Research Analyst
Joshua, a graduate of UW, Stevens Point, works directly with Eric Koppa on researching target companies to penetrate on retained search projects.
