51 Years
- Ronald L Westlake
52 Years
- Gregory A Peterson
- David T Owen
- Larry J Moore
- John B Brommel
53 Years
- Fred A Thomas
- Richard F Tedrow
- Charles J Stephenson
- Vannard E Christiansen Jr
- James D Boller
54 Years
- Timothy H Wilson
- Willie H Williams
- Richard L Upchurch
- Jon R Turner
- George C Skalicky Jr
- Francis W Segar
- Gary R Parkin
- Terry T Baal
- Robert D Anderson
- Gerald A Beglau
- Charles B Chervek
55 Years
- Ron Wilkerson
- Frank J Kaufmann Jr
56 Years
- Richard D Sturtz
- Ronald D Miklus
- Sydney R Guest Jr
57 Years
- Michael V Wilde
- Bernard A Smith
- Bruce P Skidmore
- Michael J Murphy
- Ronald J Merryfield
- Thomas A Lindsay
- Kenneth E Laver
- David L Kooker
- Wayne L Cole
- Robert A Bell
58 Years
- Harry F Wertz Jr
- John R Tschantz
- Dennis D Martin
- John H Chamberlain
59 Years
- Danny H Moore
- Maynard M Mettler
- Rex L Kehoe
- Peter F Hodak
- Donald G Chamberlain
- Paul R Anderson
60 Years
- Donald R Williams
- Garrett J Osborne
61 Years
- Gerald L Starrett
62 Years
- Robert E Patterson
- Jon H Miklus
- Marvin E Franke
- David J Claussen
- James S Carlisle
- Thomas R Brees
63 Years
- Paul L Kilzer
- Norman D Fuller Jr
- Charles W Erickson
64 Years
- Donald D Sullivan
- David A Miller
- Cecil D Goforth
- John L Burch
65 Years
- Edward L McElroy
- James J Holland
- John A Hammond
66 Years
- William D Hickman
- Marvin L Cole
- Gayle A Dewinter
- Richard D Coe
67 Years
- Kenneth M Thomas
- Theodore J Storm
- Craig Q Burchfield
68 Years
- Howard W Robbins
- Joseph R Cardwell
69 Years
- Patrick J Fisher
70 Years
- Melvin Mitchell
74 Years
- Elmore L Titus
75 Years
- William F Miklus
